- CHAMBERLAIN CWPIR ADD-ON SENSOR
Bought this for my business. Was the 2nd or 3rd entry alert system I've tried. I assumed that for the price, it must be better than the other battery operated sensors. I was wrong. Works about 60% of the time, have customers at front desk and don't know. Resorted to supplementing the system with bells on the door again. Alert tone is VERY quiet, even on max volume. Surely there's SOMETHING better out there. Keep looking for it...
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