Feature: 1. LCD Display: Portable line finder, equipped with LCD display, which can display the test results intuitively. The main menu has the functions of WireMap, Pair & Length, Coax/Tel and SETUP. 2. Multiple Uses: Suitable for testing the length and breakpoint of the network cable, connectivity test, and calibration function of the on off, crossover, and short circuit length of the network cable. 3. Efficient And Reliable: Equipped with 8Pcs remote adapters, high measurement accuracy, small errors, high efficiency, and the work efficiency is improved. 4. Lightweight And Easy To Carry: This portable line finder is small and lightweight, compact in structure, easy to carry and use, and has a calibration function. 5. Voltage Protection: Compatible with RJ45 connector, support AC 60V/DC 42V voltage protection, low battery display, cable test maximum distance is about 1000 meters. Specification: Item Type: Network Cable Tester Material: ABS Model: NF-8108-M Battery: 4 x AA 1.5V Battery (Battery Not Included) Purpose: Cable Length And Connectivity Test Display: LCD Screen 53x25mm / 2.1x1.0in Audio Frequency: 225Hz Maximum Cable Test Distance: 1000 Meters Compatible Connector: RJ45 Function Selection: 3 Position Buttons and 1 Power Switch Fault LCD Display: LCD Display Voltage Protection: AC 60V/DC 42V Low Battery Display: LCD Display (6.5V). Package List: 1 x Host (Battery Not Included)8 x Remote Unit1 x Tool Bag1 x Manual Note: 1. Before opening the case, remove the test cables from the circuit and turn off the device.2. Regularly wipe with a damp cloth and mild detergent, do not use abrasives or solvents.