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"external modems"
AJMRTC 1Set 1 Channel Relay Shield for Wemos D1 Mini ESP8266 Development Board, Relay Module for Smart Home Switch, IoT Project Control
Limited time offer, ends 11/25
$10.84
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AJMRTC ESP8266 WiFi Relay Module, ESP-12F Chip DC7-30V Power Supply, 1 Channel 10A 220V AC Relay Network Switch, Remote Control Relay Board for Smart Home Automation
Limited time offer, ends 11/29
$20.80
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AJMRTC Green ESP8266 Network Relay Module, 10A 220V AC Relay Board, DC 7V~30V Input Wireless WIFI Relay Switch Module for Smart Home Automation Remote Control Electronic Projects
Limited time offer, ends 11/25
$15.99
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AJMRTC 1 Channel 5V USB Relay Module, Programmable Computer Control USB Relay Switch Board, USB Powered Relay Controller for Home Automation Industrial Equipment On Off Control
Limited time offer, ends 11/25
$15.87
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AJMRTC ESP8266 ESP-12F Single Channel Relay Module Development Board, DC 5-80V Wide Voltage Power Supply Wireless Wi-Fi Relay Switch for IoT Smart Home Automation Control
Limited time offer, ends 11/25
$15.23
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AJMRTC ESP8266 Single Channel Relay Module with ESP-12F Development Board, DC5-80V Wide Voltage Power Supply Relay Control Board, Wireless WiFi Switch for Smart Home Automation & IoT Projects
Limited time offer, ends 11/25
$10.54
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AJMRTC ESP32 Development Board 4Channel BT Relay Module, AC 220V 30A 4 Way Relay Control Board, Bluetooth Wireless Switch Module, Supports Secondary Development for Home Automation DIY IoT Project
Limited time offer, ends 11/25
$21.88
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AJMRTC HID Drive-Free USB 1 Channel 5V Relay Module, One-Channel USB Relay Switch, Control Relay ON/OFF Directly via Computer, No Extra Driver Needed for PC Automation Control
Limited time offer, ends 11/25
$12.44
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AJMRTC IRF540 MOSFET Drive Module, 3 Channels Electronic Building Block, High Current FET Switch Module for Arduino ESP32 Raspberry Pi DIY Electronic Project
Limited time offer, ends 11/25
$17.11
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AJMRTC DC 5V USB Relay Module, 1CH 1 Channel Programmable Computer Control Relay Board, USB Controlled Switch Relay for Smart Home Automation and Electronic Control Projects
Limited time offer, ends 11/25
$13.77
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AJMRTC DC 5-80V ESP8266 ESP-12F Single Channel Relay Module, WIFI Wireless Relay Switch Development Board, Wide Voltage Power Supply for IoT Smart Home Industrial Control
Limited time offer, ends 11/25
$15.23
Free Shipping
AJMRTC 10PCS MOC3063 DIP-6 Opto Triac Coupler IC, Zero-Crossing Optocoupler, Isolated Triac Driver Chip, for AC Switch Control, Solid State Relay, Motor & Lamp Circuit DIY Projects
Limited time offer, ends 11/25
$12.03
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AJMRTC One-Touch Power Switch Module, Electronic Latching Power Button for Load On/Off Control, Replaces Traditional Mechanical Switches for DIY Circuit, Smart Device Power Control Board
Limited time offer, ends 11/25
$11.27
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AJMRTC 2262 2272 4 Channel 315MHz Wireless Remote DIY Kit, Transmitter and Receiver Module Set, RF Wireless Control Board for Electronic DIY Robot and Remote Switch Project
Limited time offer, ends 11/25
$11.88
Free Shipping
AJMRTC EWB4CHD1 EWelink WiFi Bluetooth Smart Switch Receiver, AC85250V & USB 5V DualPower 4Channel Dry Contact Relay Module, APP OnOff Remote Control for Home Automation & Industrial DIY Project
Limited time offer, ends 11/25
$19.67
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AJMRTC ESP8266 Relay Controller Module with ESP-12F WiFi Chip, DC 5V-80V Wide Voltage Power Supply Wireless Relay Switch, for IoT Smart Home APP Remote Control Electronic DIY Projects
Limited time offer, ends 11/25
$10.54
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AJMRTC ESP8266 Single Channel Relay Module ESP-12F Development Board, DC 5-80V Wide Voltage Power Supply Wireless Relay Switch for IoT Smart Home Automation Projects
Limited time offer, ends 11/25
$14.99
Free Shipping