support longtime oprationhigh-efficiency power management, support longtime oprationinside rechargeable battery supported by the solar enegy. no worry about the power anymoreAuto power off, power onAfter two minutes of stop of the car engine, judged by the sensor element, the detector turn off the power automatically. And when the engine of the car was started, it will turn on automatically.ACC (auto alarm cancel)preset by users to cancel the alarm which is unnecessary.provides unique audible and visual alerts for Safety Warning System signals Technical Specs:Operating BandLaser: 904nm, 33MHz bandwidthRadar Receiver / Detector TypeSuperheterodyne, GaAs FET VCOScanning Frequency DiscriminatorDigital Signal Processing (DSP) Laser DetectionMultiple High-Performance Laser SensorsDisplay TypeLED