General description The Self Powered Wireless Doorbell is a convenient and innovative solution for home security, designed for both kids and the elderly. This doorbell operates without batteries, converting the energy from the button press into electrical energy. It features two buttons that allow you to distinguish between front and rear doors, with different melodies emitted from the receiver for each button. The doorbell is equipped with brilliant lights, making it particularly suitable for elderly or deaf-mute individuals. Technical specifications Receiver size: 95 x 65 mm Button size: 74 x 40 mm Input: 50/60 Hz Volume: 0-110 dB Melody options: 60 Operating distance: 150 meters (open distance) Plug Type: US Plug Voltage: AC 110V Color: Black Material: Plastic Compatibility and accessories Supports up to 8 buttons with no restrictions on receivers Recommended: Additional professional doorbell waterproof cover for outdoor use Usage Choose from 60 melodies to customize your doorbell