Wireless Door Bell Welcome Chime ding-dong door Chime Entry Alert Entrance Alarm Greeting Warning Door bell Security Door

Features :

Volume is adjustable.
16 kinds of melody music.

Specification : 

Battery: 3 AAA / 1.5V batteries ( batteries are not included )

Effective Alarming Detecting Distance: Approx. 2~8 meters

DC : 9V (Can connect with a DC adapter wall charger directly, not included)

Power Switch: 10 seconds delay
Color: White
Alarm Sound: 75~95 decibels

Package Includes :

1 x Wireless Door Bell Welcome Chime