IP55 Waterproof Wireless Door Bell Long Detect Distance RELIABLE&DURABLE- 20+ years working in the electronics and wireless transmission field to ensure us has enough experiences to make the products reliable and durable. LONG WIRELESS RANGE- Adopt FSK+FHSS wireless transmission technology to avoid the other wireless frequency signal interference. the wireless range from the remote push button to the plug-in receiver is up to 1000 feet (actual range will vary depending on the local terrain); the wireless range can go through the doors/walls/floors/and etc. 35 CLASSIC MELODIES OPTIONAL- Up to 35 classic melodies optional,4 levels volume adjustable and LED flash indicator. the kit not only can be used as the doorbell,but also can be used as a panic button for the elders, quiet the classroom for the teacher,train your pets and etc. DIY DESIGN,SUPER EASY TO SET UP- Plug the receiver into a socket and fix the remote push button on anywhere you want with the included accessories(double-sided adhesive tape). the remote push button is rated IP65 weatherproof and acceptable for outdoor use. SUPERIOR CHIME SELECTION 35 pleasant chimes and match different chime with different button. 1000Ft (300 meters) OF OPERATING RANGE Enough coverage for your large property. 3-YEAR LIFESPAN Easy to replace (23A battery included) SIMPLE INSTALLATION 1.Attach adhesive; 2.Place; 3.Plug in. PRATICAL FEATURES Waterproof and weatherproof to withstand the elements. VISUAL AND AUDIO ALERTS LED indicators,5 adjustable volume levels(include mute mode for quiet hours.) REMEMBERS YOUR SETTINGS Retains chime and volume settings if up plug and even during power outages. Perfect to use in a variety of spaces HOMESOFFICESCLASSROOMS ,Apartments and so much more! _x000D_