Honeywell RCWL3501A1004/N Decor Wireless Doorbell / Door Chime and Push Button,Honeywell,RCWL3501A1004/N" /> Wireless - Battery operated Works with up to six (6) push buttons, motion detectors or door contacts for added security and convenience Six (6) chime tunes and fully adjustable volume Self learning code system automatically adjusts to eliminate interference 450-ft operating range