Widely used in telephone times, calling devices, time pieces electronic toys, satety equipments, RFID. Specifications SFM-27-A-I SFM-27-A-II Rated Voltage(V) 12 12 Voltage Range(V) 3-24 3-24 Rated Current(mA) ≤ 12 ≤ 30 Sound Output(dB) ≥ 95 ≥ 90 Resonant Freq(Hz) 3000± 500 3000± 500 Operating Temp(º C) -20~+60 -20~+60 Storage Temp(º C) -30~+70 -30~+70 Weight(g) 7 7.5
