5301 Wireless Infrared Motion Sensor Welcome Alarm Doorbell

5301 Wireless Infrared Motion Sensor Welcome Alarm Doorbell
1. Brand new and high quality!
2. Uses advanced micro-computer manufacturing technology, automatic body sensing, high performance, energy-saving ease of use.
3. Sensitivity, without inadvertently touching& interference, so that it can effectively monitor the environment from a variety of account within the scope of its monitoring of human movement.
4. More suitable for the needs of the market closer to the lives of consumers, applicable to the office, home, shops, factories and other place, bringing the convenience, but also bring unexpected joy and a sense of security.
5. Effective alarming detecting distance: 5m-10m.
6. Effective angle: 110 degrees.
7. Alarming sound depth: 75-95 decibels.
8. Power by 3 x AAA batteries (not included) or DC 9V power supply (not included).