Widely used in telephone times, calling devices, time pieces electronic toys, satety equipments, RFID. Specifications SFN-30 Rated Voltage(V) 30 Current Consumption(mA maximum) 4.5 at 12Vp-p/0.4KHz Sound(dB) 90 at 12Vp-p/10cm Resonant Freq(Hz) 4000± 500 Operating Temperature(30%pf) 22000 Operating Temp(º C) -20~+45 Storage Temp(º C) -20~+60 Weight(g) 5