Product Features:

 *Wireless Alert Chime Retail Business Home Security Motion Sensor Alarm 

*4 stages adjustable volume control , commercial grade entry alert doorbelll for smaller retail stores 

*Battery power supply or Micro USB 

*Customized DIY ring tones as you like .Built-in 4M disk for storage 

*PIR motion sensor detector 

*Detection area :Horizontal degree 100degree , Vertical 15degree 

*non-waterproof ,Used in Door only 

*Customized package and brand are available . 

If you want to know more product detailed information,pls click below link.

https://kingserry.en.alibaba.com/product/62173207851-812450682/Wireless_PIR_Motion_Sensor_Doorbell_Infrared_DIY_Store_Door_Entry_Visitor_Alert_Chime_Burglar_Alarm_Doorbell.html?spm=a2700.shop_plgr.41413.10.437f1f3dxAk8UG