Human infrared induction sound column 20W,This product adopts infrared pyroelectric + microwave induction technology. When a person passes through the rang···

Voice Broadcast outdoor sound column 20w4-channel node triggers playback(Short circuit trigger playback).Each channel corresponds to one voice.DC12V power suppl···

Voice short circuit triggers playback Horn 5W4-channel node triggers playback(Short circuit trigger playback).Each channel corresponds to one voice.DC12V power ···