This handheld portable network cable tester is a practical tool for all kinds of communication lines and engineering maintenance personnel. It helps you quickly and efficiently find the cable you need from a large number of cables. This product can be widely used in telephone system, computers network, video network, optical communication engineering and other metal wire line occasions. If you need it, come and have a try, it will not let you down. Features: Adopt LCD intuitive display screen for you to see the data more clearly, and with three modes for you to switch freely: POE mode, digital mode and analogs mode. POE testing function: This tool can be used for testing standard and non-standard POE device, it can also test POE voltage, power supplys polarity and power supplys mode. Voltagee test function: You can click "V" to enter the voltage test function, which can measure the battery voltage and voltage polarity and you can pre "V" again to enter the POE test mode. You can measure the POE power supplys line and voltage. Adjustable sensitivity: when receiving signal is strong, turn down the sound gear;when receiving sianal is weak, raise the sound gear, which can give you a more accurate testing data. With LED flashlight function, you can turn on the flashlight in time when the light is weak or when you use it at night, so that you can use it normally in a dark environment. Specifications: Material: ABS Type: ET612/ET613 (optional) Power: Transmitter: 3*AA battery (NOT INCLUDED) Receiver: 9V (NOT INCLUDED) Analogue cable tracing: Digitalized cable tracing: Tracking cables with PoE support: Identify wire pairs & quality of wire connections: Battery voltage polarity checking: Battery Voltage measurment (for reference only): PoE voltage polarity checking: PoE Voltage measurment (for reference only): Split pair: Breakpoint checking: Continuity test: Tracing signal transmiion distance: 3Km Output signals level: ~15Vp-p Vibration indication: ONLY ET613 Flashlight: Loudne adjustable: Low battery indicator: Package size: 220 * 148 * 50mm / 8.7 * 5.8 * 2.0in Package weight: 389g / 13.7ounce Packing list: 1 * Transmitter 1 * Receiver 3 * Cable