Feature: 1. Multi‑purpose Internet cable checker, can detect wiring errors, measure cable length, and voice remote recognizer. 2. It has a wide range of applications and is suitable for integrated wiring in telecommunications bureaus, Internet cafes, telecommunications engineering and other environments. 3. It can test the connection, crossover, and short connection for 5E/6E/RJ45 Internet cable/RJ11 telephone cable/BNC cable. 4. It is small and portable, small in size and light in type, easy to carry out to detect the length of the breakpoint of the Internet cable. 5. Sturdy and durable, made of ABS material, not easy to damage, can be used for a long time, very durable. Specification: Item Type: Internet Cable Checker Material: ABS Test Type: For 5E/6E/RJ45/RJ11/BNC Measuring Length: 1350m Calibration Accuracy: 5% (±0.5m) Calibration Length: >5m Display Unit: M or ft Battery Type: 4xAA batteries (Battery Not Included) Screen Size: 4x16 dot matrix LCD screen. Package List: 1 x Host(Battery Not Included)1 x Sub-Machine 1 x Manual