Key Features: High-Precision Localization: Utilizing advanced technology, it accurately and efficiently locates various cables such as Ethernet, telephone lines, electrical wires, or other metallic conductors, providing users with reliable cable tracking . Multi-Cable Testing: Supports testing of various cable types, including Ethernet (RJ45) and telephone lines (RJ11), catering to diverse work requirements. Measurement Range Adjustment Knob: Highlighting a distinctive feature, the measurement range adjustment knob allows users to flexibly adjust the power of the digital signal, ensuring optimal performance in different work scenarios. Material: plastic colour: Black Package Contents: 2 x Transmitter + receiverx1 3.7V rechargeable battery 1 x Headphones 1 x RJ45 adapter cable 1 x RJ11 adapter cable 1 x RJ11 to alligator clip cable 1 x English instructions Only the above package content, other products are not included. Note: Light reflection 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.