Enjoy infinite usage with no need for charging or replacing batteries. Our PoE tester draws power from line when in use, making it completely self-sufficient. guesswork and safely and efficiently check for voltage and compatibility before installing your device. Test PoE cameras, VOIP phones, and WiFi installations without interrupting data . Quickly detect and identify PoE type, measure power consumption from DC power supplies, and activate any port on an AF/AT/BT PoE switch. Activate "" mode to PoE switch, allowing you to effectively test your devices. Utilize as a powerful tool for diagnosing PoE problems and easily observing loss in the Ethernet cable. Our PoE tester detects how much power any PoE or DC powered device requires. New, ergonomically curved body design is now 25% smaller, making the GEN2.5 easier to hold and use in every situation. Pocket-sized, this PoE tool is easy to stow away when not in use. Bonus Feature - It also measures DC power supply voltages from 3.5 to 56 volts and current up to 280 at 56 volts. Displays Mode A & Mode B from 20v to 56 volts. LED display is bright, clear and easy to read., Manufacturer: Akfldms