Item Type:Doorbell
Communication Interface:Wireless
Detection range: 4-8 m
Volume: 4 levels adjustable (Can't adjust volume at alarm mode)
Induction method : infrared sensor triggered
3 modes: Voice Alarm Music at Voice" mode: Human voice dingdong ninhao huan ying guang ling;at "Alarm"mode: keeps you aware of intruders;at "Music" mode: just as a doorbell with 32 music to welcome your guests
Ambient temperature/humidity : -10-40 Celsius Degrees 5% -95% RH
Detection Angle: Horizontal Angle of 110 degrees vertical Angle of 15 degrees
The main function: Automatic body sensing ultra-long wide-angle detection. Adjustable direction (with stand). Host built-in speakers alarm loudness of 75-95 db
Installation : No need professional personnel easy to install yourself
Installation height: 1.5m-2.5m
Music: 32 music and vocals optional
Size: Height 7.5cm Width 8cm thickness 4.5 cm (with base - base can be flat or fixed on top)
Battery: 3 x AAA batteries (batteries are not included)

Package content :
1 x Door Bell Alarm
2 x Screws
1 x Bracket
1 x Double-sided adhesive
1 x Block the cardboard
1 x Manual"