Wireless easy mounting design never affects your inner decoration and can be placed at any location. Intelligent flash light brings convenience to the hearing handicapped. Alternatively used as a message paging alarm for the patient or babies. Features: 36 music tunes for you to choose. Doorbell powered by: 2x AA battery(not included) Remote powered by: 1x 12V 23A button battery (not included) Dimensions: doorbell unit 100mm x 68mm x 25mm; remote button 81mm x 52mm x 14mm Description: Intelligent digital remote control doorbell,ideal for homes,offices,guest rooms,hotels,hospitals and etc. Delicate streamlined appearance. Easy to install, no wire needed. Delicate design shows your smart taste. Energy saving and the battery inside the button can last up to for one year(20 presses per day). All day long anti-interference system and encrypted encodin decoding at 1/100000 prevent the doorbell from interferences outside or between neighbours. Ultra-distance represents the technology of surpassing obstacles(about 150 feet/50m range). Package Includes: 1 x Doorbell 1 x Remote