16mm (electronic buzzer) used for electrical equipment, machinery equipment, and medical equipme buzzer(electric buzzer, magnetic buzzer)Rating Voltage :6V,12V,24V AC/DCRating Current:20mA~70mAFrequency:2.3±0.5KHLife:1000HInsulation Resistance:≥1000MΩDielectric Strength:1000VSound output at 1m(dB):75Ambient Temperature:-10oC~+55oC. 16mm electronic buzzer