... design, easy to take along 1. Non-contact voltage detector for cables, power, circuit breakers, lighting fixtures, ... the tester is working, and bring brightness3. When voltage is detected, bright red LED will shine with ... conserves and extends battery life6. When microprocessor indicates low battery, the meter will stop working7. CAT ... LR03 or NEDA 24A battery Voltage Detector VD03 ,shine with buzzer,