Features: Backlight LCD Screen shows test results clearly, simple and easy to use. Trace and locate RJ45 (STP / 4-core), RJ11, USB, BNC cables. Anti-jamming, capable of working on the exchanger and PC startup. Measure cable length for RJ45, BNC cable. Check open, short, cross, crosstalk for RJ11, RJ45, BNC Cable. Locate short and breakage point accurately. Specifications: LCD screen: 53 * 25mm / 2.1 * 1.0in Tone frequency: 225Hz The Max. distance of tracing cable electrified wire: 3000m Non-electrified wire: 2000m The Max. distance of cablemapping: 2500m The Max. distance of cable length testing: 1000m Compatible with connectors: RJ11,RJ45,BNC,USB Voltage protection: AC 60V/DC 42V Transmitter size: 185 * 80 * 32mm / 7.3 * 3.1 * 1.3in Receiver size: 218 * 47 * 29mm / 8.6 * 1.8 * 1.1in Remote size: 107 * 30 * 24mm / 4.2 * 1.2 * 0.9in Package size: 230 * 135 * 85mm / 9.1 * 5.3 * 3.3in Package weight: 540g / 1.2lb Packing List: 1 * Transmitter 1 * Receiver 1 * Remote Recognizer 1 * User Manual