New Intelligent Wireless Doorbell Home Remote Self Generating Music Elderly Caller Dingdong Doorbell, 38 Of Music To Choose From Features: Product Name: Doorbell Color: white Material: ABS Gross weight: 0.3 pound (135 g) Product size: 3.34x 3.14x 0.98 in 8.5x 8x 2.5cm) Product packaging: 3.93x 3.54x1.96 in ( 10x9x5 cm Product Description: Convenient to use, easy to install, versatile for one thing, visiting, express delivery knocking on the door. elderly hearing aid, bedroom ringing Volume key: There are five of sound, the first level is silent, and the size of the second to fifth gradually increases.Loudspeakerlarge volume, widely broadcast, clear and resounding voice. Water proofing design , not afraid of wind and rain, avoidance rainwater European and American design style, fashionable and elegant appearance, simple, embellishing the beauty of the family with doorbells The smart home starts with doorbells38 music options, good sound, distance free, sensitive and easy to use Used for home life, office buildings, hotel services, residential buildings, factories, construction sites, and other environments within a short distance of 300 meters. Package Content: 1x host 1x the doorbell 1x Instructions 1x adhesive tape 1xScrew