Features: 1. External earphones are used to isolate noise. If the environment is noisy during line hung, you can bring earphones for . 2. The volume can be adjusted according to the environment, and the volume can be easily controlled by turning the dial lightly. 3. With receiver light, without fear of the dark environment, easily solve the trouble of dark area operation in the construction site without light source. 4. The product has a high‑standard line interface, you can find the line on and off. 5. Widely used in a variety of situations, such as engineering wiring, computer room maintenance, etc. Specification: Item Type: Line Finder Auxiliary Functions: Flashlight function, earphone function, volume adjustment, transmitter low voltage prompt Testable Wires: Network cables, telephone cables, audio and video cables, power cables (tested by the clip line without power). Working Temperature: 0-40℃, maximum 80% relative humidity (non-condensing) Storage Temperature: -10-50℃, maximum 80% relative humidity (non-condensing) Tracking Distance: 0-1000 meters Power Supply: 2x1.5V AAA (Battery Not Included) Transmitter Size: Approx. 120 x 50 x 25 mm / 4.7 x 2 x 1 in Receiver Size: Approx. 184 x 42 x 25 mm / 7.2 x 1.7 x 1 in Weight: Approx. 292g / 10.3oz Package List: 2 x Host (Battery Not Included) 1 x R11 Clamp Cable For Testing 1 x RJ45 Network Cable For Test Line Sequence 1 x Test Dedicated Headset 1 x Portable Cloth Bag 1 x Manual 【Silent】External earphones are used to isolate noise. If the environment is noisy during line hunting, you can bring earphones for monitoring. 【Adjustable】The volume can be adjusted according to the environment, and the volume can be easily controlled by turning the dial lightly. 【Functional】With receiver light, without fear of the dark environment, easily solve the trouble of dark area operation in the construction site without light source. 【High Standard】The product has a high‑standard line interface, you can find the line on and off.