Feature: 1. UTP STP RJ45 RJ11 cable tester. 2. Automatically and efficiently scan incorrect wiring, wireless cable, open circuit and short circuit. 3. Provide TEL BNC test (requires adapter). 4. Remotely test up to 1000 feet cable (including remote kits). 5. Protection power supply switch, low power consumption. 6. High quality protective cover provides safer protection. 7. Determine the continuity of the cable or wire. 8. Track cables or wires and diagnose breakpoints. 9. Receive audio signals on cables or telephone lines. 10. Identify the working status of the telephone wire (clear ring, busy). 11. Send a single fixed sound or double alternating sound to the object cable or wire. 12. Come with an earphone for use in noisy environment. Specification: Item Type: Cable Tester Power Supply: DC 9V alkaline battery (not included) Operating Current: Tester: ≤20mA; Receiver: ≤150mA Signal Transmission Mode: Multi-Frequency Pulse Signal Output Level: 8Vp-p Signal Transmission Distance: ≥3km Size: Emitter: 130x60x33mm / 5.1x2.36x1.3in; Receiver: 210x35x25mm / 8.27x1.38x0.98in Package List: 1 x Emitter1 x Receiver1 x RJ11 Cable1 x RJ45 Cable1 x Earphone1 x Adapter Cable with Alligator Clip1 x User Manual