<p>POE HAT (B) for Raspberry Pi 4B\/3B+,Power Over Ethernet HAT,Support 802.3af PoE Network,802.3af Power-Sourcing Equipment Required</p> <p>Integrates PCF8574 IO expander for I2C bus, providing pin P0 for directly fan control, and more spare IO pins</p> <p>0.91Inch OLED, for monitoring processor temperature, IP address, and fan status in real-time; Onboard cooling fan, allows auto running on powerup OR programmable control, configured by switch</p> <p>POE POWER INPUT:37V ~ 57V DC in. POE POWER OUTPUT:5V 2.5A DC out .</p> <p>OLED PIXELS:128x32. NETWORK STANDARD:802.3af PoE. OLED DRIVER:SSD1306. OLED DISPLAY COLOR:white.</p> <p>DESCRIPTION</p> <p>Power Over Ethernet: Providing Both Network Connection And Power Supply For Your Raspberry Pi In One Cable</p> <p>Cooling Fan: Allows Auto Running On Powerup OR Programmable Control, Configured By Switch; Automatically Turn On\/Off Depending On The Raspberry Pi Processor Temperature</p> <p>Onboard 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)</p> <p>PoE (Power Over Ethernet) capability,802.3af-compliant</p> <p>Fully isolated switched-mode power supply (SMPS)</p> <p>colour: blue</p> <p>Material: PC board + metal</p> <p>size: 65x56.5mm</p> <p>Package Contents:</p> <p>1*PoE HAT Expansion Board</p> <p>1*Screws kit</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection 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.</p>