This BetterLiving® BetterLiving® Portable Vibrating Doorbell is specially designed for the hearing-impaired. The doorbell boasts an ample selection of melodies and three modes; ringing, vibrating and flashing. The doorbell includes a long-distance anti-interference remote control with a stable signal which can be received anywhere in the home. The BetterLiving® Portable Vibrating Doorbell features a back clip, which can be clipped onto a belt or pocket making it more convenient for the user to carry on their person. Features: Wireless doorbell is ideal for the hearing impaired Portable receiver Long range transmission Rings, vibrates and flashes Multiple modes and ringtones Ability to link multiple doorbells Extended receiver range and belt clip Batteries required: 3x AAA (included)