Widely used in telephone times, calling devices, time pieces electronic toys, satety equipments, RFID. Specifications HC-12054 6.5Ω8Ω16Ω42Ω Rated Voltage(V) 1.5 1.5 1.5 1.5 Rated Current(mA) ≤ 70 ≤ 60 ≤ 30 ≤ 15 Coil Resistance(Ω ) 6.5± 1 8± 1 16± 1 42± 2 Sound Output(dB) ≥ 85 ≥ 85 ≥ 85 ≥ 80 Resonant Freq(Hz) 2048 2048 2048 2048 Operating Temp(º C) -20~+45 -20~+45 -20~+45 -20~+45 Storage Temp(º C) -20~+60 -20~+60 -20~+60 -20~+60 Weight(g) 1.4 1.4 1.4 1.4