12mm 40khz receive Ultrasonic Sensor 1. Diameter:12mmSENSOR; 2. Height:9.5mm; 3. ... 40KHzSENSOR;4. SPL:min.110dB;DATE SHEETDIELINEDongguan cosson electronic plasic CO.,LTD(COSSON ELECTRONIC TECHNOLOGY (HK) CO., Ltd). specialize in ... piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor,Atomization piece, speakers and other audio components. And our company ...