Swann Home Doorbell Kit Alert Ring Detector, White (SWADS-DOORBK-GL) Easy to use do-it-yourself wireless Doorbell alert system for home or business lets you know when theres someone at the door for your convenience & security Connect in minutes with easy mounting, pairing & convenient wireless operation (uses 3 x AA batteries for Receiver)^ ^ Batteries not included Position the Doorbell at your front or back doorway & enjoy the convenience of wireless with a long range up to 200ft/60m* from the Doorbell to Receiver The Receiver Unit emits an audible chime & lights up when the Doorbell is pressed with 3 volume levels or use silent mode with blue lights flashing Choose from up to 36 chimes to sound when the Doorbell is pressed