Powered by batteries, our Bird Sound Doorbell ensure you can't avoid the crazed squawking. These doorbells are widely demanded in residential places for alarming of the arrival of any visitor. Also, it is very easy to fit on outer or exterior doors of the residency. The provided doorbell is designed under the strict supervision of our experts by utilizing premium quality components according to the latest industrial standards. In order to design Bird Sound Doorbell, we are using premium quality Solder which is environmentally friendly as well as prevents dry solder therefore increasing the lifespan of the bells. Moreover, it operate on 230 V AC, we can also offer the same for usage on 110 V AC.