Power over Ethernet (POE) HAT for Raspberry Pi 4B/3B+, 802.3af PoE Network Standard, 5V 2.5A DC Output, Onboard 0.91" OLED Display and Cooling Fan, with Isolated Switched Mode

【PoE HAT for Raspberry Pi 4B/3B+】Standard Raspberry Pi 40PIN GPIO stackable header, supports Raspberry Pi 3B+/4B, allows Power Over Ethernet HAT connecting other HATs 【Power Over Ethernet】PoE (Power Over Ethernet) capability, IEEE 802.3af-compliant power sourcing equipments, providing both network connection and power supply for your Raspberry Pi in one Ethernet cable 【Onboard 0.91" OLED Display】128 × 32 pixels, I2C-bus controlled, monitoring processor temperature, IP address, fan status in real-time 【Onboard Cooling Fan】Allows auto running on powerup OR programmable control the fan, configured by switch, support automatically turn on/off depending on the Raspberry Pi processor temperature 【Integrate PCF8574 Chip】PCF8574 IO expander for I2C bus, providing 8 IO pins, of which P0 for fan control