No noise and interference to various network switch devices Quickly find the target line, the sound is clear and loud throughout Withstand voltage DC 60V, POE power supply switch can directly finder The transmitter directly pairs the router/switch Telephone line on/off/positive/negative/chick test Multiple metal cable check points check short circuit/line Finder With NCV non-contact induction pen function (greater than A45V) Specifications: Signal Transmission: Digital signal (no interference, no noise) Compatible Devices: Ethernet switches/routers/optical modems, etc., with weak electrical devices for live wire tracing and cable testing Tracing Function: Can trace RJ45, RJ11, and metal wires Pairing Function: Detect cable breakage, short circuits, and wire sequence (Ethernet cable) Line Level Detection: Positive and negative line level detection Telephone Line Status Detection: Judging the status of the working telephone line (ring indicator light prompts) Continuity Function: Determine if the cable is continuous POE Switch Voltage Endurance: POE-powered switches can directly trace live wires; the direct current voltage should be less than 60V Switch Port Pairing: The transmitter directly detects the wire sequence of the switch port Signal Transmission Distance: 0-300 meters Operating Temperature: 0~40°C, maximum relative humidity of 80% (non-condensing) Storage Temperature: -1~50°C, maximum relative humidity of 80% (non-condensing) Power Supply: 9V 6F22 (same for receiver and transmitter), not included Size: Receiver: 190*40*23mm Transmitter: 140*60*25mm