1. -360 line finderne finder adopts advanced frequency generating device, which can generate alarm sound at the audio sounding end. The closer the distance, the louder the sound. 2. In a noisy environment, you can use an external earphone to listen to the sound recognition, and you can also search for other metal cables through the adapter. 3. The transmitter has a DC level test function, and the level can be judged by the brightness of the status indicator: the brighter the light, the higher the level; the darker the light, the lower the level. 4. You can adjust the volume button at will when searching for a line, and the volume of the sound is controlled by you. In a noisy environment, you can also wear headphones to operate to avoid external interference. In the dark or dark environment, the receiving end is also illuminated The indicator light brings convenience and speed to all staff. This line finder is the most advanced network wiring instrument on the market. Name: Internet Phone Finder Maximum operating current: transmitter 10MA; receiver 30MA Signal output level: 8Vp-p Signal transmission distance: 1KW Colour:black+yellow Material:plastic Package Contents: 1 x Network Cable Tester(Without 9V battery) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Network cable checker network tester network tracer