● Sound and Light Instruction
● Cont and Tone LED Light

Applications
– Judge Continuity of the Cables or Wires
– Track the Cables or Wires, and Diagnose the Break Point
– Receive the Tone Signal on the Cables or Wires(Telephone Line)
– Identify the State in the Working Telephone Line(Clear, Ringing, Busy)
– Send a Single Solid or a Dual Alternating Tone to the Target Cables or Wires