Network cable collation: Judge short-circuit, breaking circuit, open circuit and crossing.
Test line level, positive and negative polarity.
Status of telephone line checking: Test the working status of telephone line (idle, ringing, and off-hook) and judge TIP and RING line.
Check wire continuity.
Specification:
Operating temperature: 0°C ~ 40°C, maximal 80% relative humidity (non-condensing)
Storage temperature: -10~50°C, maximal 80% relative humidity (non-condensing)
Altitude: <2000m( meter)
Anti-explosion rating: IP 40
Distance of emitting signal: about 300m.
Emitter Battery: 6F22/9V
Receiver Battery: 6F22/9V
Receiver Battery: 6F22/9V