When the cord is pulled, the India Bell is rung and at the same time a switch is closed which will then activate the transmitter and send a radio-frequency signal to the indoor bell.
Size: 35" high (includes pull cord) x 3 1/2" wide x 9 1/2" deep.
Materials used for this project:Imported exotic wood incense box with brass, cotten pull cord, brass wire.
Cost: included with purchase of any Doorbell.
For more technical details and photos click here or on GEAR