Xcellent Global Wireless Remote Alert Alarm System for Perso The wireless, easy mounting design does not damage wall and allows portable use of the receiver, as well as the transmitter. System range of up to 500+ ft in open area (Indoor effective range is less than 500 feet) - 32 melody/alarm sounds to choose from, adjustable volume control, and multiple receiving options to eliminate interference from other devices Call button can be worn as a pendant, carried on pocket, or placed at bedside - Call button is water resistant - Receiver can be wall mounted, placed near caregiver, or carried in pocket Color: White and Red. Receiver powered by 3 x AAA batteries(not included); Transmitter powered by 1 x CR2032 battery(included) Great Christmas Gift Idea: Ideal for the elderly, handicapped, or sick to page their caregiver. Also good for massage therapists, The perfect answer to knowing for sure when the client is ready without waiting too long to enter the room or not giving them enough time before knocking.