Xhaiden Wireless Cordless Calling Remote Door Bell for Home Office Shop Remote Control Doorbell Long operating range reach over 100 meters. such Remote Control Doorbell is easy to install, with double-side stickers/tape at the back of the remote button. so Wireless Doorbell doesn’t affect the decoration.Specifications For Home and Office use Pleasant sound and bell options Intelligent Flash Light (an aid to the hearing handicapped) Easy Mount Design Battery provided-lasts 1 year if bell is pressed 20 times a day Suitable for Building, Hospitals,Clinics,Offices,Homes,Factory and so on. feature : Wireless Signal Receiving and Sending. Remote Control Range Up to 50 Meters. IC Based Multi – Music Sound (32 Melody Music). Built in Anti-Interference Design, Avoid Interference Between Users. Low Power Consumption. Place it Anywhere at Your Will. Easy to Install, With Double-Side Stickers at the Back of the Switch Button. Built in Double Speakers, Make Sound Clear. Especially Suitable for Homes, Offices, Factories, hotels etc. Reprogrammed 32 Songs and Automatically Changing Per Press on the Switch Button Comes with 23A 12V Battery Cell for the Switch Button, You Just Need to put 2 X 1.5V AA batteries (Pencil Cells) in it Separately. Material: Plastic Color: White Packing Size(mm): 190(L)x133(W)x28(H) Approx Package Include: 1 x Door Bell 1 x Remote Control 1 x 12V 23A Remote Battery