Features DYNAMIC CALIBRATION UP TO 97%: Cable length dynamic calibration function has a length measurement accuracy of up to 97%, allowing for single person cable connectivity testing. SOUND PROMPT FUNCTION: The remote adapter is paired with sound prompt function, easy to monitor the statues, easy to use. INDEPENDENT MEASUREMENT: Measure the length to determine the distance. Length and pairing measurements can be performed with or without the insertion of a remote identifier. EASY TO USE: Simple operation together with 1350m test range distance largely simplifies the testing and greatly improves working efficiency. EASY CARRYING: Comes with a small size and a lightweight as well, easy to carry the tester around for convenient use. Specification: Item Type: Network Cable Tester Mode: SC8108 Material: ABS Battery: AA x 4 (shipped without battery) Calibration Accuracy: 5% (± 0.5m or 1.5ft) Test Range: Approx. 1350m / 4429.1ft Product Function: Detect 5E, 6E coaxial cable and telephone line wiring faults. Package List: 1 x Tester  1 x Manual  1 x Accessory  Package List 1 x Tester 1 x Manual 1 x Accessory