Value applying rated voltage(2048Hz,1/2 duty,square wave) Value applying(2048Hz,Sine wave,measuring Current 60μΑ) SPECIFICATIONS Type KLS3-M-1285P-A KLS3-M-1285P-B KLS3-M-1285P-C Rated Voltage(V) 1.5 Operating Voltage(V) 1~2 Rated Current( mA) ≤30 ≤12 ≤10 Coil Resistance (Ω) 16? 42? 50?.5 Coil Impedance( Ω) 40 120 140 Sound Output at 10cm(dB) ≥85 ≥80 ≥80 Resonant Frequency(Hz) 2048 Operating Temperature(℃) -25~+70 Storage Temperature(℃) -30~+85