Support Dropshipping and Wholesaling. 100% Original and Good Quality with Free After-sale Warranty. 1. Standard RASPBERRY PI 40PIN GPIO connector,support RASPBERRY PI 3B + / 4B 2. POE (Power over Ethernet) function,in line with 802.3AF;3. Fully isolated switching power supply (SMPS) 4. 0.91inch OLED for real-time monitoring of processor temperature,IP address and fan status 5. Onboard cooling fan,allowing automatic operation or programmable control by switch 6. Integrated PCF8574 IO expander for I2C bus,providing pin P0 for direct fan control,and more spare IO pins Technical index: POE power input: 37V~57V DC input POE power output: 5V 2.5A DC output OLED pixels: 128x32 Network standard: 802.3AF POE OLED drive: solid state drive 1306 OLED display color: white 1. Power over Ethernet: provide network connection and power supply for Raspberry Pi through a cable 2.128x32 pixels,real-time monitoring of processor temperature,IP address,fan status controlled by I2C bus 3. Allows automatic operation of power-on or programmable control,configured by the switch,and automatically turned on/off according to the processor temperature colour: blue Material: plastic Package Contents: 1 * PoE HAT (B) 1 pack * mounting screws Only the above package content,other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.