• Sold by Newegg
Brands
Show More
Type
Show More
All Top Brands
Sold by
Useful Links
Customer Ratings
Sort By:
View:
Planet IPOE-162 Industrial IEEE 802.3at Gigabit High Power Over Ethernet Injector (Mid-Span)
Quick View
Planet IPOE-162 Industrial IEEE 802.3at Gigabit High Power Over Ethernet Injector (Mid-Span)
  • Type: PoE Injector
  • Specifications: Interface: "Data" Input Port: 1 x RJ-45 STP "PoE (Data+Power)" Output Port: 1 x RJ-45 STP Input power terminal block: 1 LED Indicator: System: Power 1, Power 2, Fault (Green) PoE Port: PoE in Use x 1 (Green) Network Cable: 10Base-T: UTP Cat. 3, 4, 5, up to 100m (328 ft.) 100Base-TX: UTP Cat. 3, 4, 5, up to 100m (328 ft.) 1000Base-T: UTP Cat. 5, 5e, 6 up to 100m (328 ft.) EIA/TIA- 568 100-ohm STP (100m) Data Rate: 10/100/1000Mbps Dimension: 1.26" x 5.31" x 3.46" Weight: 1.05 lbs. Unit Input Voltage: 24 - 48V DC; 24V AC Power Consumption: 30 watts max. Number of device can be powered: 1 Installation: DIN rail kit and wall mount ear Alarm: Provides one relay output for power failure, Alarm relay current carry ability: 3A at DC 30V Enclosure: IP30 slim type metal case Power over Ethernet PoE Standard: IEEE 802.3at High ...
  • Model #: IPOE-162
  •  
  • OMR52.49 
  • OMR52.04 Shipping
Digi 70001805 Digi One TS Device Server
Quick View
Digi 70001805 Digi One TS Device Server
  • Specifications: Interfaces/Ports: 1 x RJ-45 Data Transfer Rate: 230 Kbps Serial Management: SNMP Protocols: Telnet Reverse Telnet PPP SSH v2 HTTP DHCP ARP RARP TCP UDP Status Indicators: Link / Power Input Voltage: 100 V AC to 240 V AC 9 V DC to 30 V DC Input Current: 400 mA 12 V DC 500 mA 9 V DC to30 V DC
  • Parts: 1 year limited
  • Labor: 1 year limited
  • Model #: 70001805
ZyXEL 5G PoE / PoE+ / PoE++ Port with 60 Watt Injector, POE12-60W
Quick View
ZyXEL 5G PoE / PoE+ / PoE++ Port with 60 Watt Injector, POE12-60W
  • Part Number: POE12-60W
  • Type: Product Type: PoE+ Injector Protection Type: Overload Protection Short Circuit
  • Color: Black
  • Specifications: Ports: - 1 x 100M/1G/2.5G/5G/10G (Data) - 1 x 100M/1G/2.5G/5G/10G* (Power/Data) Total PoE budget: 60W PoE Standard: IEEE 802.3bt PoE++ Input: 100 - 240 V 1.0A, 50/60 Hz Dimensions: 140 x 65 x 38.5 mm / 5.51" x 2.56" x 1.52" Weight: 278g / 0.61 lb. Input Voltage: 120 V AC 230 V AC Maximum Input Current: 1 A Maximum Output Power: 60 W Package Contents: 5G PoE++ Injector Power Cord Compatibility: Zyxel Products: WBE660S WAX640S-6E WAX650S Certifications & Standards: IEEE 802.3u 100BASEX IEEE 802.3ab 1000BASE-T IEEE 802.3bz 2.5G/5GBASE-T IEEE 802.3an 10G BASE-T Environmentally Friendly: Yes Environmental Compliance: Restriction of Hazardous Substances (RoHS)...
  • Model #: POE1260W
HPE Aruba Instant On 10G SFP+ to SFP+ 3m Direct Attach Copper Cable R9D20A
Quick View
PLANET POE-161S IEEE 802.3at Gigabit Power Over Ethernet Plus Splitter with 5V / 12V DC Output (10/100/1000 Mbps)
Quick View
PLANET POE-161S IEEE 802.3at Gigabit Power Over Ethernet Plus Splitter with 5V / 12V DC Output (10/100/1000 Mbps)
  • Type: PoE Injector
  • Color: White
  • Specifications: Hardware Version: 2 Interface: "Data" Out Port:1 x RJ-45 STP "PoE (Power + Data)" Input Port:1 x RJ-45 STP DC Out Plug Connector:1 LED Indicator: System: 1 x PoE in Use (Green) Network Cable: UTP Cat. 5/5e/6, up to 100m (328 ft.) Data Rate: 10/100/1000 Mbps PoE Standard: IEEE 802.3at Gigabit Power over Ethernet / PD PoE Power Input: IEEE 802.3at 52~56V DC DIP Switch: 5V DC / 12V DC output voltage Number of devices that can be powered: 1 Standards Compliance IEEE 802.3 10BASE-T Ethernet: IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3ab 1000BASE-T Gigabit Ethernet IEEE 802.3af Power over Ethernet IEEE 802.3at Power over Ethernet Plus
  • Model #: POE-161S
  •  
  • OMR26.24 
  • OMR26.37 Shipping
PLANET IPOE-171-95W Industrial Single-Port 10/100/1000 Mbps 802.3bt PoE Injector (95 Watts, -40~75 degrees C, 12~48V DC)
Quick View
PLANET IPOE-171-95W Industrial Single-Port 10/100/1000 Mbps 802.3bt PoE Injector (95 Watts, -40~75 degrees C, 12~48V DC)
  • Type: PoE Injector
  • Specifications: Interface: Input Port: 1 x RJ45 STP Data In Output Port: 1 x RJ45 STP PoE (Data + Power) Out Input power terminal block: 1 Network Cable: Twisted-pair cable up to 100 meters (328 ft.) 10BASE-T: 4-pair UTP Cat. 3, 4, 5, 5e, 6 100BASE-TX: 4-pair UTP Cat. 5, 5e, 6 1000BASE-T: 4-pair UTP Cat. 5e, 6 Data Rate: 10/100/1000 Mbps Dimensions: 1.26" x 5.31" x 3.46" Weight: 1.04 lbs. Power Requirements: DC 12~48V, 5A max. Unit Output Voltage: DC 54V Power Consumption: 120 watts max. Standards Compliance: IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3ab 1000BASE-T Gigabit Ethernet IEEE 802.3bt 4-pair Power over Ethernet Type 4 IEEE 802.3at Power over Ethernet Plus Package Contents: IPOE-171-95W User's manual Wall-mount kit Dust cap
  • Model #: IPOE-171-95W
  •  
  • OMR129.14 
  • OMR21.14 Shipping
PLANET PWR-65-56 AC to DC Power Adapter (100-240V AC to 56V DC) - for LRP-101 Series
Quick View
PLANET PWR-65-56 AC to DC Power Adapter (100-240V AC to 56V DC) - for LRP-101 Series
  • Type: PoE Adapter
  • Specifications: Input Voltage AC: 100-240V AC Output Voltage DC: 56V DC Power Output: 65W. Max. Operating Temp: 0 to 40 degree C
  • Model #: PWR-65-56
  •  
  • OMR18.89 
  • OMR21.16 Shipping
PLANET LRP-101CH 1-Port 10/100 TX PoE PD + 1-Port Coax Long Reach PoE Injector
Quick View
PLANET LRP-101CH 1-Port 10/100 TX PoE PD + 1-Port Coax Long Reach PoE Injector
  • Type: PoE Injector
  • Specifications: Ethernet Interface: Copper: 10/100BASE-TX RJ45, auto-negotiation / auto-MDI / MDI-X Power over Ethernet Standard: IEEE 802.3at/af PoE PD (Powered Device) PoE Input: Supports both Mid-span and End-span PSE Input Range: 48~56V DC Data Rate: 100/100 Mbps Cabling: Cat5e or above Maximum Distance: 100 meters Maximum Frame Size: 1522 bytes LED Indicators: 4 x LEDs PWR LRP LNK PoE IN LNK / ACTESD Protection: 4 KV DC EFT Protection: 2 KV Enclosure Metal: case Installation: Wall mount or DIN rail with optional kit Power Requirements: RJ45 PoE Input: 802.3at/af 48~56V DC DC Input: 48~56V DCStandards Compliance: Standards Compliance: IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3af Power over Ethernet (802.3at Type 1) IEEE 802.3at Power over Ethernet (802.3at Type 2)
  • Model #: LRP-101CH
  •  
  • OMR87.14 
  • OMR32.23 Shipping
StarTech 4-Port Gigabit PoE+ Injector, Midspan Hub, 54V/30W - 802.3at/802.3af | POEINJ4G-US
Quick View
  •  
  • OMR62.99 
  • OMR26.31 Shipping
APC NBES0308 NetBotz Leak Rope Sensor - 20 ft.
Quick View
APC NBES0308 NetBotz Leak Rope Sensor - 20 ft.
  • Type: Sensor
  • Specifications: Operating Environment: 32 - 113 °F (0 - 45 °C) Storage Temperature: 5 - 149 °F (-15 - 65 °C) Operating Relative Humidity: 0 - 95% Storage Relative Humidity: 0 - 95% Dimensions: 2.76" x 6.73" x 6.34" Weight (Approximate): 15.52 oz Operating Elevation: 0-10000 feet (0-3000 meters) Storage Elevation: 0-50000 feet (0-15000 meters) Environmental Compliance RoHS,REACH: Contains No SVHCs
  • Parts: 2 years limited
  • Labor: 2 years limited
  • Model #: NBES0308
  •  
  • OMR160.64 
  • OMR21.15 Shipping
HPE AP-270-MNT-V1 AP-270 Series Outdoor Pole/Wall Long Mount Kit
Quick View
Planet IPOE-162S Industrial IEEE 802.3at Gigabit High Power Over Ethernet Splitter
Quick View
Planet IPOE-162S Industrial IEEE 802.3at Gigabit High Power Over Ethernet Splitter
  • Type: PoE Splitter
  • Color: Black
  • Specifications: Interface: "PoE (Power + Data)" Input Port : 1 x RJ-45 10/100/1000Base-T "Data" Out Port: 1 x RJ-45 10/100/1000Base-T DC Out Plug Connector: 1 removable 4-Pin terminal block LED Indicator: System: Power Ready x 1 (Green) Network Cable: 10/100/1000Base-T: 4-Pair UTP Cat. 5, 5e, 6 Distance up to 100m (328 ft.) EIA/TIA- 568 100-ohm STP (100m) Data Rate: 10/100/1000 Mbps (vary on Ethernet device attached) DIP Switch: 12V DC / 24V DC output voltage Power Input: 802.3at PoE 48~56V DC Power Output: 12V / 24V DC, max 2A (adjustable) Enclosure: IP30 metal case Installation: DIN rail kit and wall mount ear ESD / EFT Protection: 6 KV DC PoE Standard: IEEE 802.3at High Power over Ethernet Number of devices that can be powered: 1 or 2 (Vary on device's power requirement; DC1 + DC2 cannot be over 25 watts.) ...
  • Model #: IPOE-162S
  •  
  • OMR49.34 
  • OMR21.15 Shipping
PLANET IPOE-171-60W Industrial Single-Port 10/100/1000 Mbps 802.3bt PoE Injector (60 Watts, -40~75 degrees C, 48~56V DC)
Quick View
PLANET IPOE-171-60W Industrial Single-Port 10/100/1000 Mbps 802.3bt PoE Injector (60 Watts, -40~75 degrees C, 48~56V DC)
  • Type: PoE Injector
  • Specifications: Interface: Input Port: 1 x RJ45 STP Data In Output Port: 1 x RJ45 STP PoE (Data + Power) Out Input power terminal block: 1 Network Cable: Twisted-pair cable up to 100 meters (328 ft.) 10BASE-T: 4-pair UTP Cat. 3, 4, 5, 5e, 6 100BASE-TX: 4-pair UTP Cat. 5, 5e, 6 1000BASE-T: 4-pair UTP Cat. 5e, 6 Data Rate: 10/100/1000 Mbps Dimensions: 1.26" x 5.31" x 3.46" Weight: 0.95 lb. Power Requirements: DC 48~56V, 2A max. Unit Output Voltage: DC 45~53V Power Consumption: 75 watts max. Standards Compliance: IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3ab 1000BASE-T Gigabit Ethernet IEEE 802.3bt 4-pair Power over Ethernet Type 3 IEEE 802.3at Power over Ethernet Plus IEEE 802.3af Power over Ethernet Package Contents: IPOE-171-60W User's manual Wall-mount kit Dust cap
  • Model #: IPOE-171-60W
  •  
  • OMR93.44 
  • OMR21.15 Shipping
Planet IPOE-E174 1-Port Ultra PoE to 4-Port 802.3af/at Gigabit PoE Extender
Quick View
  •  
  • OMR92.39 
  • OMR32.22 Shipping
PLANET PWR-480-48 DC Single Output Industrial DIN Rail Power Supply Units
Quick View
PLANET PWR-480-48 DC Single Output Industrial DIN Rail Power Supply Units
  • Type: Power Supply
  • Specifications: Hardware Version: 2 Dimensions: 5.04" x 3.35" x 4.92" Weight: 3.31 lbs. Input Voltage: 100-240V AC, 50/60 Hz, 4.8A Power Output: 480 watts, 48V, 10A Temperature: Operating: -20 ~ 70 degrees C Storage: -40 ~ 85 degrees C Humidity: Operating: 20 ~ 95% Storage: 10 ~ 95% (non-condensing) Installation: DIN rail TS-35/7.5 or 15
  • Model #: PWR-480-48
  •  
  • OMR86.09 
  • OMR21.15 Shipping
Aruba Instant on 802.3af POE Midspan
Quick View
Ubiquiti Networks Toolless Mini Rack U-Rack-6U-TL
Quick View
UBiQuiTi IW-HD-BK-3 Access Point In-wall HD Cover, 3-Pack
Quick View
ZyXEL 2.5G PoE / PoE+ Port with 30 Watt Injector, POE12-30W
Quick View
ZyXEL 2.5G PoE / PoE+ Port with 30 Watt Injector, POE12-30W
  • Part Number: POE12-30W
  • Type: Product Type: PoE+ Injector Protection Type: Overload Protection Short Circuit
  • Specifications: Power Description Input Voltage: 120 V AC 230 V AC Maximum Input Current: 1 A Maximum Frequency: 60 Hz Maximum Output Power: 30 W Interfaces/Ports Input Ports: 1 x 2.5 Gigabit Ethernet Output Ports: 1 x 2.5 Gigabit PoE+ Compatibility: Zyxel Products: WBE530 NWA130BE WAX620D-6E NWA220AX-6E WAX610D WAX510D NWA210AX Certifications& Standards: IEEE 802.3u 100BASEX IEEE 802.3ab 1000BASE-T IEEE 802.3bz 2.5GBASE-T Package Contents: 2.5G PoE+ Injector Power Cord
  • Model #: POE1230W
Planet POE-173 60-Watt Ultra Power Over Ethernet Injector
Quick View
Planet POE-173 60-Watt Ultra Power Over Ethernet Injector
  • Type: PoE Injector
  • Color: Black
  • Specifications: Interface: LAN: 1 x RJ-45 STP, "Data" Input Port POE: 1 x RJ-45 STP, "Data + Power" Output Port AC Connector: 1 x AC Input power socket, IEC-320 C6 Network Cable: Ultra PoE (60W): 4-pair UTP Cat. 5, 5e, 6 up to 100m (328 ft.) 802.3af / at PoE(15W / 30W): 2-pair UTP Cat. 3, 4, 5, up to 100m (328 ft.) LED Indicator: System: Power x 1 (Green) PoE Port: Active, PoE ready / In Use x 1 (Green) Data Rate: 10/100/1000 Mbps Unit Output Voltage: DC 50-57V, 1.2A Power Requirements: 100-240V AC @ 50/60 Hz, 1.5A max. Power Consumption: 60 watts max. PoE Standard: Ultra PoE over 4-pairs UTP, High Power over Ethernet End-Span / Mid-Span PSE PoE Power Supply Type: End-Span + Mid-Span Power Pin Assignment: Pair 1 End-Span: 1/2 (+), 3/6 (-) Pair 2 Mid-Span: 4/5 (+), 7/8 (-) PoE Power Output: DC 50-57V/60-w...
  • Model #: POE-173
  •  
  • OMR34.64 
  • OMR32.23 Shipping
HPE S1F81A Wireless Access Point Antenna
Quick View
HPE S1F81A Wireless Access Point Antenna
  • Part Number: S1F81A
  • Type: Antenna
  • Model #: S1F81A
POWER SUPPLY TZ570 TZ670
Quick View
SonicWall
POWER SUPPLY TZ570 TZ670
  • Model #: 02-SSC-3078
HPE AP-ANT-340 Cabled RP-SMA Tri-Band 4x4 Downtilt Omni Ceiling Antenna  S1F82A
Quick View
Digi 70001807 PortServer TS 4 MEI Device Server
Quick View
Digi 70001807 PortServer TS 4 MEI Device Server
  • Type: Consumer Electronics
  • Color: Black
  • Specifications: Interfaces/Ports: 4 x RJ-45 1 x RJ-45 Data Transfer Rate: 230 Kbps Serial Management: Telnet SNMP Digi Port Authority-Remote HTTP for easy browser configuration Status Indicators: Link / Power Input Voltage: 100 V AC to 240 V AC 9 V DC to 30 V DC Input Current: 400 mA 12 V DC 500 mA 9 V DC to30 V DC
  • Parts: 1 year limited
  • Model #: 70001807
Axis  T8134 60W High PoE Midspan with Data Connectivity
Quick View
Axis T8134 60W High PoE Midspan with Data Connectivity
  • Type: PoE Midspan
  • Color: Black
  • Specifications: Data rate: 10/100/1000 Mbps Installation and management Power Selector: 15 W or 30 W Automatically detects PoE and High PoE-enabled devices and supplies inline power Local LED management display Input power AC Input Voltage: 100 to 240 V AC AC Frequency: 50-60 Hz Max. output power: 55 V DC (max. 60 W) Connectors Shielded RJ45, EIA 568A and 568B Power connector C13 Network
  • Features: IEEE 802.3at 100 to 240 V AC Support for Axis PTZ domes Plug-and-play
  • Model #: 5900-334
  •  
  • OMR79.79 
  • OMR21.15 Shipping
HPE R9J32A Aruba USB-A to USB-C PC-to-Switch Cable R9J32A
Quick View
HPE R9J32A Aruba USB-A to USB-C PC-to-Switch Cable R9J32A
  • Brand: HPE
  • Part Number: R9J32A
  • Type: Cable
  • Color: Black
  • Model #: R9J32A
  •  
  • OMR43.04 
  • OMR16.44 Shipping
PLANET VF-101G-KIT 1-Channel 4-in-1 Video over Gigabit Fiber Bundle Kit (VF-101G-T + VF-101G-R)
Quick View
PLANET VF-101G-KIT 1-Channel 4-in-1 Video over Gigabit Fiber Bundle Kit (VF-101G-T + VF-101G-R)
  • Type: Other
  • Specifications: Video Channel: 1 channel bi-direction Signal Mode: NTSC / PAL / SECAM Video Connector: BNC Video Bandwidth: 60 MHz Video Input / Output Voltage: 1.0 Vpp / typical peak-to-peak value Video Input / Output Impedance: 75 ohm / unbalanced interface Supported Video Type: 1080p: AHD / TVI / CVI 480p: CVBS Video Digital Bit Width: 8/10 bit Differential Gain (DG): < 1.3% (typical value) Differential Phase (DP): < 1.3 degree (typical value) SNR Weighted: > 67 dB (typical value) Data Channel: 1 channel Physical Protocol: RS485 Operation Mode: Simplex Data Connector: 3-pin terminal block with screw clamps Data Rate: DC-115.2 Kbps Bit Error Rate (BER): < 10ns LED Indicators: Power Video Link (fiber optic) Power Requirement: 5V DC, 2A Power Consumption: 4.8 watts (maximum) Mechanical: Metal Installation: Wall-mountable, DIN-rail (with optional...
  • Model #: VF-101G-KIT
  •  
  • OMR139.64 
  • OMR19.13 Shipping
PLANET VF-102G-KIT 1-Channel 4-in-1 Video over Gigabit Fiber Bundle Kit (VF-102G-T + VF-102G-R)
Quick View
PLANET VF-102G-KIT 1-Channel 4-in-1 Video over Gigabit Fiber Bundle Kit (VF-102G-T + VF-102G-R)
  • Type: PoE Converter
  • Specifications: Video Channel: 1 channel bi-direction Signal Mode: NTSC / PAL / SECAM Video Connector: BNC Video Bandwidth: 60MHz Video Input / Output Voltage: 1.0 Vpp / typical peak-to-peak value Video Input / Output Impedance: 75ohm / unbalanced interface Supported Video Type: 1080p: AHD / TVI / CVI 480p: CVBS Video Digital Bit Width: 8 / 10 bit Differential Gain (DG): < 1.3% (typical value) Differential Phase (DP): < 1.3 degree (typical value) SNR Weighted: > 67 dB (typical value) Data Channel: 1 channel Physical Protocol: RS485 Operation Mode: Simplex Data Connector: 3-pin terminal block with screw clamps Data Rate: DC-115.2 Kbps Bit Error Rate (BER): < 10ns LED Indicators: Power Video Link (fiber optic) Power Requirement: 5V DC, 2A Power Consumption: 4.8 watts (maximum) Mechanical: Metal Installation: Wall-mountable, DIN-rail (with ...
  • Model #: VF-102G-KIT
  •  
  • OMR143.84 
  • OMR21.15 Shipping
Ubiquiti UF-WIFI-US 4-Port GPON Router with Wi-Fi
Quick View
Ubiquiti UF-WIFI-US 4-Port GPON Router with Wi-Fi
  • Type: Switches
  • Model #: UF-WIFI-US
  •  
  • OMR37.79 
  • OMR16.61 Shipping
Power Cord - Straight See Notes-Recommended Switches
Quick View
  •  
  • OMR9.44 
  • OMR14.93 Shipping

Wireless network accessories include hardware and auxiliary equipment that boost the reliability of installed home and office networks. Some components also reduce the setup time as well as the risk of problems during setup. The essential factors to consider before buying wireless networking equipment products include the number of connected devices, network compatibility and the size and layout of the network cover, among other factors. Whether you are looking to install a network conveniently or you want to provide ease of use and boost speeds, a versatile range of routers, network antennas and PoE adapters and injectors are well-suited to meet your wireless networking needs.

Wireless Network Antennas Send and Receive Signals Over Different Frequencies

Most network antennas have an internal pigtail piece that connects the wireless card to the chassis exterior and a customizable external antenna. Consider factors such as gain, physical size and frequency bands when shopping for these wireless network accessories. Typical screw-on antennas have a gain range of about 2-7db. Network antennas with a higher decibel rating perform better at strengthening weak signals. Make sure the antenna covers both single- and dual-band frequencies, so you can have both Bluetooth® and legacy wireless networks operating seamlessly within the same frequency range.

Wireless Routers Distribute the Network Signal Efficiently Across Different Devices

A variety of routers are available with features and performance capabilities for different building layouts and positioning requirements. Routers that use Wi-Fi® 5 are significantly faster, and they provide stronger signals throughout the house with their more advanced features. Signal sipper routers offer less throughput, and they are well-suited for small apartments where you can install them a room away. Signal gulpers have a long range with stable data throughput, and they are cost-effective for large buildings with many floors and rooms. In addition to tolerance to orientation, a sector antenna delivers high gain (13-16dBi) and superior beam performance. Choose a climate-resistant outdoor antenna that can operate reliably in a range of environmental conditions.

Wireless Adapters Allow PC Connection to a Network Without Ethernet Cables

The essential factors to consider when choosing wireless adapters include the build quality, adapter size, form factor, frequency and wireless protocols. The USB adapter operates as a typical flash drive, and it is convenient and easy to install. PCI adapters feature multiple antennas and spatial multiplexing for maximum data throughput. Choose a wireless adapter that transmits in the same frequency as your router to guarantee fast and reliable connectivity. Experts recommend using adapters with at least 2.4GHz for homes with many walls or other interfering wireless devices to maintain signal strength over a distance. A wireless range extender/media bridge rebroadcasts the existing Wi-Fi signal so you can simultaneously stream and rebroadcast media content and engage in online gaming. The Gigabit Ethernet adapter is a type of PoE adapter that is essential for connecting network devices far away from the power source. The two-wire pairs in the Ethernet cable transmit data, and the remaining pair transmits electric power to the device.