Features:
The electronic guest-saluting doorbells, the elite of the advanced computer manufacturing technology apply the function of automatic light sensitivity.
The excellent function, easy usage, energy saving, and high sensitivity make it meet the need of market more and closer to consumers' lives.
It not only brings you convenience but also give you the unexpected happiness and safety. Powered by 3 AA batteries (not include)

Operating distance: 5~45cmIt's suitable for the dwelling houses, shops, offices, factories and so on.Instruction1.
Insert 3 pieces of AA 1.5V quality battery, it will work just move the switch to button 鈪?or 鈪?.

push this button you can choose one from sixteen musics.3. Light control distance is 4-8meters (depend on the environment and the light suitable for using indoor)
Remarks: The light cann't be too strong (such as sunlight beating) or too weak (such as in darkness)Color: white
Dimension: 100*64*36mm
Weight: 82g
Package include:
1* Electronic Motion Sensor Guest Saluting Doorbell
Package dimension: 106*132*42mm
Package weight: 118g