... .20mA; 3. SPL:min.70dB; 4. Frequency:400Hz; KS-23S003AW Mechanical buzzer1. Rated voltage:3.0VDC;2. Rated current:max.20mA ... producing electro-acoustic components such as buzzer(Piezo electric, electromagnetic, mechanical), piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor ...