Features: Supports both network and telephone cable, it can test UTP & STP cable continuity. Supports RJ45/RJ11/R]12/CAT5/CAT6/CAT7 UTP wire. Automatically runs all tests and checks of cable continuity situation(short, cross and open). It can test corresponding double-twisted cable 1, 2, 3, 4, 5, 6, 7, 8 and G, meanwhile, it can judge wrong connection, short circuit and open circuit. Powered by a 9V battery, it is on standby mode after installing the battery, quickly get the testing result when insert cables. POE anti-burn protection design is effectively avoid to burn out the device cause of plugging live cables, and protect the chip from damage. Durable ABS material, which is anti-drop and shock-proof. Portable handheld design, easy to use, suitable for home and office networks. Specifications: Material: ABS Main Function: Verify RJ11,RJ45 cables Power: 9V 6F22 alkaline battery (NOT included) Item Size: 95 * 90 * 18mm / 3.74 * 3.54 * 0.71in Package Weight: 160g / 5.64oz Package Size: 19 * 12 * 3.2cm / 7.48 * 4.72 * 1.26in Package List: 1 * Tester 1 * Manual (English)