... police vehicle, ambulance, ship, traffic lights, etc;2) For industry: solar power generation, wind power generation, Metal Halide ... machine, punching machine, weeder,air compressors, etc.;7) For electronics: TV, DVD, game machine, power amplifiers, audio ... Yellow LEDLow Battery AlarmAlarm sounds:BiBi~BiBi~Low/High Voltage alarmAlarm sounds:BiBi~Over Temperature protectionAlarm sounds: Bi~; LED indicate ...