For all those who thought that a plugin model was inconvenient, here comes the battery powered wireless doorbell. Two 3V Lithium batteries is all that you need to get it up and working. 2-1/4 inch speakers give it extremely clear and realistic sound. A 5 year warranty, 150 foot operating range and 32 built in codes to block any extrernal interference. The wireless battery doorbell is as good as it gets. 

Battery Doorbell Step Up, Sleek Design Blends With Any Decor, 3 Sound Options For Front & Back Doors Set At Button, Uses Two 3V Lithium Batteries, Included, 2-1/4" Speaker For Realistic Sound, Adjustable Volume Control, Uses 4 "C" Cell Alkaline Batteries, Not Included, 32 Selectable Codes To Block Outside Interference, Up To 150' Operating Range, Expands With Add-On Doorbells/Chimes RC3523, RC3253 &/Or Additional Buttons RC3301, RC3302, RC3311, RC3321, 5 Year Warranty.