Features: 1. 100% brand new 2. Streamlined design and easy to carry 3. Comes with earphones usable in noisy situations 4. Flexible and versatile interface 5. Sensitive and adjustable volume control Cable Tester for UTP STP RJ45(manual switch) Automatic efficient scan for the miss wiring, disordered 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 the continuity of the cables or wires Track the cables or wires, and diagnose the breakpoint Receiver the tone signal on the cables or wires (telephone line) Identify the state of the working telephone line (clear ring, busy) Send a single solid tone or a dual alternating tone to the object cables or wires Specifications: Working current: Tester: 10mA Receiver: 30mA Signal transfer mode: Digital signal Signal output level: 8Vp-p Signal transfer distance: 3Km Dimension:Transmitter: 126x49x34mm Reveiver:175x42x25mm Power: by 2 x DC 9V Battery( not included) Package Includes: 1 x Cable Emitter 1 x Cable Receiver 1 x RJ11 Cable 1 x Earphone 1 x Cable with Crocodile Clamp 1 x Instruction Manual