Cordless Doorbell QH-821

*White color available
*Easy to install,wire free,battery operared
*FCC,CE and RoHS compliant
*Transmitter/bell push IP44 waterproof
*1 million sets of auto-learning codes to avoid interference
*Energy saving,transmitter battery can be used for over 15 months,and receiver batteries for at least 6months
*Music volume adjustable;flash,ring,or flash+ring for function option

Model No.	QH-821
Frequency	315MHz±0.5MHz 433MHz±0.5MHz
Active pressure wave(receiver)	≤-57dbm
Negative pressure wave(transmitter)	≤-36dbm
Power supply(receiver)	3X1.5V AA
Power supply(transmitter)	1X12V 23A ALKALINE BATTERY
Quiescent current	≤200uA
Transmit power	＜10mW
Operating range	UP TO 100 METERS(OPEN AREA)
Sound options	36 Polyphonic Melodies