Features:Perfect compatible installing, debugging, maintaining telephone line and other wires or cables.Detect the continuity of cables or wires without damaging the insulation.Tracking the cables or wires and diagnosing the break point.Receive the beep on cables or wires (telephone line).Identify the status of the active phone line (clear, ringing, busy).Send a single solid tone or an alternating double tone to the cables or wires of the object.Include a sender (MS6812-T) and a receiver (MS6812-R).A professional and safe tool compatible cablers.Features:Send tone frequency: 1.5 kHzReceive frequency range: 100~300kHzPower supply: 6F22 (9V)Receiver size: 23.8 x 4.3 x 2.6 cmTransmitter size: 14.5 x 3.5 x 2.5 cmReceiver weight: 106gTransmitter weight: 114gPackage size: 25.5 x 12 x 4 cmPackage weight: 296gPackage including1 * sender1 * receiver1 * Pouch