Wireless Doorbell Chime and Push Button

This is a Home Security Intelligent Wireless Electronic Doorbell. It provides an extra security and convenience for you and your family. Delicate smart part makes the doorbell a saluting angel of dwelling house, work building, hotel, building, factory and so on. You will never miss any guest. Your good choice.
Features
Completely wireless operation - no wires or cables required, very easy to install.
Receiving distance up to 110 meters.
38 tunes you can choose.
Sound volume adjustment.
Unique designs appearance shows the special tastes of the host.
Transmitter Specs
Power 1 x 23A 12V Battery (included)
Frequency 315MHz
Effective Range 70M - 110M
Dimension 7L x 4W x 2.5H cm
Receiver Specs
Power 3 x 1.5V AA Battery (not included)
Frequency 315MHz
Effective Range 70M - 110M
Dimension 10L x 6.5W x 2.5H cm
Overall Specs
N.W. 150g
Package Size 20.5L x 15.5W x 3H cm