The plug in chimes have a traditional Ding-Dong sound and fit perfectly into any standard UK/EU/US mains socket so you will never have to change the batteries in them.

Also with the extra feature of a plug through which will allows you to still use the socket outlet for other electrical products, such as your vacuum

Ding Dong Doorbell, can be matched with wireless video doorbell

Function: When the outside doorbell rang, the dingdong doorbell inside will ring, inform you that someone is coming outside.

Specification:
Brand new
Material: ABS
Working Voltage: AC 90V-250V
Working Frequency: 433.92MHz ± 280KHz
Power Consumption: 10mW
Sensitivity: -110dbm
Transmit: 0.1dbm
Volume: Up to 110db
Color: Black
Plug: US/UK/EU Plug
Size: Approx. 82 * 82 * 40mm/3.2 * 3.2 * 1.57inch

Package Included:
1 x Ding Dong Doorbell
1 x User Manual