This TT-46 detector is the only one that will let you check both single and two line phones quickly and easily. It will check your phone lines for on premises series and parallel bugs and wire taps.
- Detects series devices with a resistance of 10 ohms or more
- Detects parallel devices with a resistance of 65 megohms or less
- Checks single line phone systems for series and parellel taps
- 9V battery
- Illustrated instruction manual
- 7 1/4″ x 6″ x 2 1/4″