Description:
1. working voltage:3-4.5V
2. speaker:0.25W-2W 8ohm
Push botton once, play doorbell 3 times,about 3 seconds








1. working voltage:3-4.5V
Push botton once,
play doorbell 3 times
about 3 seconds
2. speaker:0.25W-2W 8ohm
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