This meter is a handheld network cable tester, ideal for Coaxial Cable (BNC), UTP and STP Cable installation, measurement, maintenance or inspection. It also offers a fast and convenient way of testing telephone line modes, greatly simplifies telephone line installation and maintenance. Features: · Self implement T568A, T568B, 10Base-T and Token Ring cables testing. · UTP and STP co-axial cable testing. · Network integrity and configuration examination. · Open/ shorts circuit, miss wiring, reversals, and split pairs testing. · Network Continuity testing. · Cable open/short point tracing. · Receive audio signals in the network or telephone cable. · Transmitting signal to target network and tracing cable direction. · Detect telephone line modes : ideal, vibrate, or in used (off-hook) Transmit audion signal frequency: 4KHz Receive frequency: 100-300KHz   Power supply: 9V 6F22 battery