PoE World Universal PoE Detector.
This device reports the type of PoE that is on an Ethernet cable via LED indicators, with this keychain device you can quickly find out what PoE method is available along with the approximate voltage, pinout and polarity.
You can use it with passive injectors, 802.3af, 802.3at, 802.3bt with 568A, 568B standards or reverse PoE polarity. Mode A and Mode B PoE is supported. If you are far from the PoE switch or injector – this convenient device will show if a port has power.