France imported audio life detector, frequency filter: high-pass filter and band-pass filter;2Only high efficiency and low noise acoustic amplifier.1Only omnidirectional audio sensor.2An independent high-sensitivity audio vibration detector is connected with a8mCable.1An integrated high-sensitivity microphone and a high-power loudspeaker are connected to an audio sensor.8mCable. Rechargeable battery, working5hrStereo headphones with microphones. Charger voltage:110v-220vWorking temperature:-10℃--+60℃Storage temperature:-25℃--+70℃Outline size:43*35*20cm(suitcase), total weight:7kgThe detection frequency is50Hz—15000HzThe search scope is wider.