Features:1) Voltage: DC 6 - 12V2) Sound types: single tone, 6 tones3) Color: white, black, red4) Size (W x L x H): 54 x &n
KeyWords:traffic signs air raid siren ultrasonic transducer air raid sirens alarms speaker
China Rongtech Industrial (Shanghai) Inc., is located in Shanghai, a city famous for its economic prosperity, convenient tra&n
KeyWords:piezoelectric transducer ultrasonic transducer ultrasonic sensor pzt ultasonic transducer
