ST220 telephone line tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a common Tel Line Tester, it also has the functions of high voltage protection and dangerous voltage warning, etc..
Main functions :
- Dialing, talk, hook
- Checking wire pairs
- Test insulation or break faults of the line
- Pulse/Tone switch
- Key features:
- DTMF applying to GB/T15279-94
- High voltage alarm
- Low voltage warning
- Last number redial
- Special durable test clamp
- Automatic power off and energy-save design
- Pocket size, simple operation
auto;-webkit-text-stroke-width: 0px; word-spacing:0px' Automatic power off and energy-save design.
- Pocket size, simple operation.