Features:
You can install the doorbell in locations, such as kitchen, back yard, or bedroom, never miss the guest
Completely wireless operation - no wires or cables required
Wireless easy mounting design never affects your inner decoration and makes the doorbell anywhere you like
36 melody music selectable
Wireless system, 80m remote control distance
Doorbell powered by 2 x AA batteries(not included)
Remote controller powered by 12V/23A battery(included)

Package included:
1 x Doorbell
1 x Remote controller
1 x 23A 12V battery