Wireless Remote Control Door Chime Kit with 1 Transmitter 2 Receiver

Visitor presses the button on the door unit, the room unit rings. Host picks the handset up and talks with visitor. Upon confirming visitor identity, just press the door release button on room unit to open door. Please be noted that the unlock button on the room unit works on the door lock that you have is the electric one. The door unit and room unit are connected by two wires.
Features
Completely wireless operation - no wires or cables required, very easy to install.
A flashing light indicator on the receiver is an excellent feature for the hearing impaired.
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 2 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