MASTECH MS6812 Network Cable Tester Line Tracker TelephoneFeatures:Perfect for installing, debuging, maintaining telephone line and other wires or cables.Detect continuity of the cables or wires without damaging the insulation.Track the cables or wires, and diagnose the break point.Receiver the tone signal on the cables or wires (telephone line).Identify the state in the working telephone line (clear, ring, busy).Send a single solid tone or a dual alternating tone to the object cables or wires.Include a sender (MS6812-T) and a receiver (MS6812-R).A professional & safe tool for wireman.Specifications:Send tone frequency: 1.5kHzReceive frequency range: 100 ~ 300kHzPower supply: 6F22 (9V)Receiver size: 23.8 x 4.3 x 2.6cmEmitter size: 14.5 x 3.5 x 2.5cmReceiver weight: 106gEmitter weight: 114gPackage size: 25.5 x 12 x 4cmPackage weight: 296gPackage including1 * Sender1 * Reciever1 * Pouch