Features: 100% brand new and high quality. Test of double-twisted cables: Switch on the power. (S is slow automatic grade, M is manual.) Put cables into both main tester and remote tester. The lights of the main tester will turn on sequently from 1 to G. Test correspondingly double-twisted cables 1, 2, 3, 4, 5, 6, 7, 8 and Ground. Capable to judge wrong connection, short circuit and open circuit. Cable Tester for RJ12, RJ11, RJ45, Cat 5e, Cat 5, 10/100 Base-T, ATT 258 A, TIA-568A/568B. etc. It can easily clarify cable, continuity, open and short. Verifying Cable continuity, open, short and cross wire pair up to 1000ft with remote kit. 9 LED lights to indicated wiring connection on both remote and master unit. Grounding Test. Build in power switch for power saving. Specifications: Item Type: Network Cable Tester Material: ABS Color: Gray Size: 10310030mm/4.060.391.18in (Approx.) Test of double-twisted cables: Switch on the power (S is slow automatic grade, M is manual) Main tester: 1-2-3-4-5-6-7-8-G Remote tester: 1-2-3-4-5-6-7-8-G RJ45 1-2-3-4-5-6 RJ11 Power: 9V battery ( Not Included ) Quantity: 1 Set (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 X Network Cable Tester (No retail package) 1 X User Manual