1Model No.BM1255C-0320-16BM1255C-0520-422Rated Voltage (V)353Operating Voltage (V)2～44～64Resonant Frequency (Hz)204820485Coil Resistance (Ω)16±442±66*Sound Output at 10cm (dB)≥75≥707*Current Consumption (mA)≤35≤158Operating Temperature (℃)-25～ 709Storage Temperature (℃)-30～ 7510Weight (g)1.3