Features: 

• Wide application, can be used in Home,Office,Shop,Restaurant,Garages,Sheds, Factory,etc. 

• 4 modes for switching:

1. Welcome Mode: when the infrared sensor detects someone, it will generate a "Hello, Welcome". 

2. Alarm Mode: can switch to alarm mode during night. Detect the thief through the infrared detection, and alarm, the alarm sounds volume up to 90db. 

3. Doorbell Mode: 40mm big horn. 36 songs. 

4. Night Light Mode: the receiver is quipped with led bulb, it can be served as a night light in corridor or passway. 

• 4 levels volume adjustable, 4 levels brightness adjustments 

• 36 songs selectable in music mode 

• 2 choices of power supply: 3*AA 1.5V batteries or Powered by DC 5V Micro USB power adapter. Auto-recognizes the AA alkaline battery or Ni-MH battery, and the Ni-MH battery will auto-charge when power plug in. 

• 8 meters detection distance.

• 100° horizontal detection angle and 15° vertical detection angle 

• Easy Installation: Only 2 screws and double-face tape is required, you can mount it as you like. Not suitable for outdoor because of lack of waterproof function.

  
  

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

https://kingserry.en.alibaba.com/product/62166427312-808040831/Entry_Alert_Welcome_Doorbell_with_LED_Night_Light_for_Shop_Store_Home_Villa_Office_Wireless_Infrared_PIR_Motion_Sensor.html?spm=a2700.shop_plgr.41413.10.23ce33e42gHzws