Features: Automatically runs all tests and checks for continuity, open, shorted and crossed wire pairs. Visible LED status display. Cable state testing (2-wire): Line for DC detecting, anode and cathode determination, ringing signal detecting open, short and for cross circuit testing. Cable Type: RJ11 Telephone cable and RJ45 LAN cable The rounded corners of the for shell prevent cuts to your hands during use or carrying Specifications: Size: approx 10.5x10.5x2.5cm/4.13x4.13x0.98in Material: Plastic Weight:95g fit for: Rj45 Rj11 Network Cable Power Source: DC9V Battery Required (not included) Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1x Rj45 Cable Tester