Plastic housing, DC 5V rated voltage, 2 terminals, convenient for connecting.
They have good characters like small cubage, low wastage and high voice pressure.
Size: 9 x 11.8 mm (L x D) / 0.35 x 0.46 inch
Rated voltage: 5V
Operating voltage: 4-8V
Rated current (MAX): 30 mA
Min sound output at 10cm: 85 dB
Resonant frequency: 2300±300 Hz
Operating temperature: -27 to +70 °C
Storage temperature: -30 to +105 °C