Motion Detect Sensor Door Bell

Introduction
DH-9915 Motion Sensor Door Bell using infrared motion detection, its advance micro chip prevent false alarm alert. Music or alert sound when motion detected, can be used in office, shop, factory, house and any other needs.

To power the doorbell, you have 2 options:
Use 3 AAA batteries (carbon batteries are recommended, as some alkaline batteries may not work properly and cause the doorbell to ring continuously).
or
Use a power adapter (Optional, not included, can be purchased separately). The doorbell will be directly powered by the power adapter, but it is not rechargeable and the power adapter is not for charging.

Specification
Color: White
Power supply: 3 units AAA Battery(not included) or DC 9V power supply(not included, need to order separately)
*Battery life about 1-2 month.
Iddle Current: 10mA
Working Current: 100mA
Detection distance: 2m – 5m
Sound level(Decibel): 75db-95db ±5db
Detection method: Infrared Detection
Working Temperature: -25℃ to 55℃
Working Humidity: 5% to 95% RH
Detection Angle: Up Down 60°, Left Right 110°

To avoid the false alarm, please pay attention to the following points for installing the motion detector:
1. Do not face the glass door/window.
2. Do not face a big object which is easy to swing.
3. Do not face the cold and heat air vent or cold and heat source, or anything that rapidly changes temperature.
4. Do not install near high-power appliances or any devices producing electromagnetic fields.