Buzzer module operates when input is at digital low voltage. It can be
connected to other sensing modules with low voltage output when
triggered as an audible warning alert.
Operating voltage: 4-8V
Current drain: 30 mA
Input voltage: 0V to 3V
Min sound output: 85 dB at 10cm, continuous tone
Resonant frequency: 2300±300 Hz
Price: $1.50 for 2pcs.