Wireless Door Chime QH-831A *Special surface finishing,black of white color available *Easy to install,wire free,battery opera

*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 atleast 6months*Music volume adjustable;flash,ring,or flash+ring for function option

Model No.	QH-831A
Frequency	315MHz±0.5MHz433MHz±0.5MHz
Active pressure wave(receiver)	≤-57dbm
Negative pressure wave(transmitter)	≤-36dbm
Power supply(receiver)	2X1.5V AA
Power supply(transmitter)	CR2032 3V CELL BATTERY/1X12V 23A ALKALINE BATTERY
Quiescent current	≤200uA
Transmit power	<10mW
Operating range	80 METERS(OPEN AREA)
Sound options	36 PolyphonicMelodies

QH-831A