Wireless Doorbell with Touch Button - The touch doorbell button features a new design that is dustproof and waterproof, providing higher sensitivity and lower energy consumption for reliable operation. 36 Melodies and Light Indicator - Choose from 36 melodies and 4 volume levels (mute, low, middle, high). The built-in large LED indicator offers extra assistance for the hearing impaired. Long Operating Range up to 1200 Feet - Strong wireless signal reaches up to 1200 feet in open area, preventing interference with other equipment in your home or your neighbors' devices. Easy to Install Doorbell Chime - Receiver simply plugs into an electrical outlet. Transmitter is fixed to the doorframe after pulling out the insulating sheet inside. Please avoid installing too close to metal or to devices such as televisions, WiFi equipment, or computers.