The Power-over-Ethernet (POE) Module offers a convenient and cost-effective way to deliver power to your device.The module allows you to put a onto pairs of the Ethernet cable so that devices connected to can use it as a power source.The module is perfect for any space limited PoE applications such as IP cameras, biometric , RFID, wireless access points, extenders, VOIP phones, networked audio etc.It's size is a perfect match to the 4B and 3B+ in IOT and automation applications. It is ultimate power solution for 4B/3B+.It delivers clean and power to the latest Pi 4. Easy to .Compatible With: 4 Model B / 3 Model B+Built-in Cooling FanSupport IEEE 802.3af or 802.3at PoE standardInput: IEEE 802.3af Compliant PoEOutput: 5V +-5% up to 2.5A*Protection Circuitry: Transient Overvoltage, Undervoltage Lockout, Thermal Shutdown, Foldback Current LimitingActive and adequate cooling required for stable continuous operation at high load.Colour: black + blueMaterial: ABS+PCB Package Contents:1 * POE cooling fan Power over Ethernet module3 * Screws1 * Screwdriver Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.