Features: This Power-over-Ethernet (POE) module provides a convenient and cost-effective way to power your device. The module allows you to apply a DC voltage to specific pairs of the Ethernet cable so that devices connected to the network can use it as a power source. The built-in cooling fan can automatically run during power supply or programmable control when the processor temperature is high. Its small size is perfect for Raspberry Pi 4B and 3B+ in IOT and home automation applications. It provides clean and reliable power to Raspberry Pi 4B / 3B+. Protection circuits, overvoltage protection, undervoltage protection, thermal shutdown, current limiting with feedback. Package Includes: 1 set x Raspberry Pi 4 Model B/3B+ POE Network Card. Specifications: PoE Power Supply: 37V~57V DC in Output: 5V + -5% to 2.5A Network Standard: 802.3af PoE Size: approx 30x30mm / 1.18x1.18inch Note: No retail package. Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you