Features: Cable Tester for UTP STP RJ45 RJ11. Automatic efficient scan for the miss wiring, disorder cable, open and short circuit. TEL BNC test available(Adapter needed). Remotely test cable up to 1000 ft in length (remote kit included). Protective power switch for low power consumption. High quality protective case provides more secure protection. Judge continuity of the cables or wires. 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. Streamlined design and easy to carry. Comes with earphones that can be used in noisy situation. Flexible and versatile interface. Sensitive and adjustable volume control. Specification: Emiter: 10mA Receiver: 30mA Signal Transfe Mode: Digital signal Signal Output Level: 8Vp-p Power By: 2 x DC 9V Battery(not included) Color: As the pictures show Package Weight: 313g Package included: 1 x Cable Emitter 1 x Cable Receiver 1 x RJ11 Cable 1 x RJ45 Cable 1 x Earphone 1 x Cable with Crocodile Clamp 1 x Toolkit