Power Over Ethernet HAT (B) for Raspberry Pi 3B+/4B,802.3af Compliant Power Over Ethernet Accessory Power Sourcing Equipments Needed

OverviewThe PoE HAT (B) is a 802.3 af-compliant Power Over Ethernet accessory for the Pi 3B+/4B. By using this small HAT and some proper 802.3 af-compliant power sourcing equipments, it is possible to provide both network connection and power supply for your Pi in onlyone Ethernet cable.
SpecificationPOE HAT FOR RASPBERRY PI: Power Over Ethernet HAT For Raspberry Pi 3B+/4B, 802.3 af-CompliantFor
Use With Pi 3B+/4B: Standard Pi 40PIN GPIO Stackable Header, Allows Connecting Other HATsPower Over Ethernet: Providing Both Network Connection And Power Supply For Your Pi In One Cable 0.91"
OLED Display: 128 32 Pixels, I2C-Bus Controlled, Monitoring Processor Temperature, IP Address, Fan
Status In Real-TimeCooling Fan: Allows Auto Running On Powerup OR Programmable Control, Configured By Switch; Automatically Turn On/Off Depending On The Pi Processor TemperatureOnboard PCF8574 Chip: PCF8574 IO Expander For I2C Bus, Providing 8 IO Pins, Of Which P0 For Fan Control; And Extra Spare Pins On Solder Pads (P1-P7, INT)FeaturesStandard Pi 40PIN GPIO header, fits Raspberry Pi 3B+/4BPoE (Power Over Ethernet) capability 802.3 af-compliantFully isolated switched-mode power supply (SMPS) 0.91" OLED, for monitoring processor temperature, IP address, and fan status in real-timeOnboard cooling fan, allows auto running on powerup OR programmable control, configured by switchIntegrates PCF8574 IO expander for I2C bus, providing pin P0 for directly fan control, and more spare IO pinsPackage Content1. PoE HAT (B) x12. Standoffs pack x1