Anpress 7 Color Lights Flash + Music Doorbell, Wireless Doorbell, The Deaf/Hard of Hearing Favorite, Music Can Be Changed Music Doorbell with Colorful Light-- Appearance elegant light sanded translucent design, concise and easy, 7 color lantern flashing, beautiful color is added to the bedroom, super flash, very suitable for deaf behind the ears. 3 Working Modes-- 1, Only flash; 2, Only ring; 3, Both ring and flash at the same time. A switch for you to choose what you needs best, easy to operate. Different Chimes-- 16 kinds of music songs to choose from, believe that there is always a favorite, size of the ring tone to adjust. Long Working Distance-- Can be used from 30 to 50 meters (transmitter, please don't put on metal objects, metal objects has shielding effect to the wireless signal) Easy Installation-- Simple, wireless installation, no wires or cables required,the receiver is powered by 3 AA batteries; Transmitter is powered by 1 AAA battery(included).