Motion Sensor Doorbell with 16 Music + Alarm + Voice

Features
The product uses advanced micro-computer manufacturing technology, automatic body sensing, high performance, energy-saving ease of use. Sensitivity, and 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. More suitable for the needs of the market closer to the lives of consumers, Applicable to the office, home, shops, factories and other places, bringing the convenience, but also bring unexpected joy and a sensor of security.
With 16 melodies optional
AC/DC optional
With high, mid, low volume optional
With music sound, alarm sound, voice sound optional
Technical Specifications
Supplied by 3pcs of AAA 1.5V batteries
Effective alarming detecting distance is 5-10ms
Effective angle 110 degree
Alarming sound depth: 75-95dB
Accessories
Motion sensor doorbell