Features: brand new and high quality 3000 volt isolation from POE terminal to -DC output A POE router or switch that supports the 802.3af network standard requires only one network cable to connect for to achieve networking and power supply. It can provide POE power for 4 or 3B+. Support 802.3af network standard PoE circuit The POE power supply module provides an effective solution for the device Specifications: Item: POE Power Supply Module Output Voltage: 5V 0.046A Input voltage range: 44V~57V (active POE) Working temperature: 0°C~50°C Product size: approx 59.5x39.5x11mm/2.34x1.56x0.43in Package Includes: 1 X Power Supply Module(Only) 1 X Heatsink note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.