SD-153B

Model                        SD-153BRated Voltage                30 mVOperating Voltage    

speakers, buzzers,

speakers, buzzers,

Model                        SD-153B

Rated Voltage                30 mV

Operating Voltage        50 mV

Sound Output at 10cm (dB) 90 dB

Rated Impedance                150 Ohm

Frequency Range                300 ~3400Hz.