Feature: 1. Quick Wire Finding: Quick in line tracing, this network cable tester also has strong signal for wide test range with low noise, very reliable. 2. Useful Wire Tester: Applicable to the smart testing of Internet cable, telephone line, for RJ45 and RJ11 wires and so on, with standard design. 3. Easy in Adjustment: The tone can be adjusted according to the environment, just lightly rotate the dial, and the tone can be easily controlled. 4. Better Application: Ensuring wide utilization in engineering wiring, machine room maintenance, and other scenarios, meeting your working needs. 5. Convenient Carrying: Comes with a compact size and a light weight as well, the Ethernet cable tester is very convenient to carry to outdoor. Specification: Item Type: Network Cable Tester Model: TM-8 Material: ABS Transmitter Battery: 1 x 9V battery, shipped without battery. Receiver Battery: 1 x 9V battery, shipped without battery. Maximum Working Current: Transmitter: ≤ 20mA. Receiver: ≤ 150mA. Signal Transmission Format: Multi Frequency Pulse Signal Output Electrical Status: 8Vp-p Signal Transmission Distance: Approx. ≥ 3000m / 9842.52ft. Package List: 1 x Transmitter1 x Receiver1 x Headphone1 x RJ45 Network Cable1 x RJ11 Telephone Cable1 x Crocodile Clip Cable1 x User Manual1 x Carrying Bag