How to use: 1. If you power 802.3af or 802.3at cameras, Internet phones, wireless access points and other devices, please use a 48-56V power supply with this product. This product is a passive power supply mode without automatic protocol, so the POE port is always in power supply mode and will not automatically identify and shut down. Please note: that if your camera is equipped with a 12V power supply and supports POE, for example, the nameplate on your camera says "12V 802.3af POE", this means that if the camera is powered by a switching power supply, it needs a 12V power supply, and if it is powered by POE, it needs a 48V power supply. Because 12V is used for network cable power supply, the voltage drop and loss are too large. 2. If your camera or other device does not support POE, but you need to use POE to power it remotely, then we have 5V2A, 12V1A and 12V2A POE splitters. You only need to plug the 48V POE network cable into the input port of the POE splitter, and plug the DC head and network cable head into the power and network ports of the camera respectively, and you can power non-POE devices and transmit signals. Our 12V1A splitter is equipped with a 2.1 x 5.5MM DC head, and the 5V2A splitter is equipped with a 1.3 x 3.5MM DC head. Color: Black Material: ABS Package Contents: 1 x 100Mbps PoE Injector