MOKLYF No Battery Required Wireless Doorbell, Self-Generating Waterproof Cordless Door Chime Kit 3 Receivers 1 Push Button 38 Ringtones 4 Levels Volume 390Ft Range,White (White

[120M/390FT WIRELESS SIGNAl]:Strong penetration performance, the receiving distance can reach 120 meters/390 feet,It can be widely used in Home, Office, Apartment, Villa,Hospital, Warehouse, etc. Besides, it can also act as a nursing equipment for the elderly or patient; [SELF-GENERATION OF BUTTONS]: No battery is needed, and the generator can be turned into electric energy by pressing a finger. Say goodbye to the trouble of replacing the battery, which is environmentally friendly and energy-saving; [WATERPROOF DESIGN]: can prevent rainwater intrusion, and effectively extend the service life of the product; [38 MELODIOUS CHIMES& 4 ADJUSTABLE VOLUME]:38 different ring tones allow you to change the ringtone freely. 4 Adjustable Volumes for you to adjust, meet your different needs; [SUPER EASY INSTALLATION]:Two ways installation for push button, stick it with adhesive tape or mount it with screws and anchors. The package includes both double-sided adhesive tape and screws needed for the installation;