Self-Powered & No Battery RequiredKinetic energy generation by pressing, no batteries needed, forever power-free, eco-friendly and maintenance-free.IP68 Waterproof & WeatherproofIP68 highest waterproof rating, works in rain, snow and extreme weather, perfect for outdoor installation.4 Volume Levels & 50+ Melodies4 adjustable volume levels (mute to 110dB), 50+ optional chimes, customize your doorbell sound.1000ft Long Wireless RangeUltra-long transmission through walls/floors, stable connection for large homes, villas and apartments.200,000+ Press Durability TestProven 200,000+ press endurance, durable construction, 10+ year service life, easy plug-and-play setup. | Cluzine | | Self-Powered Wireless Standard Doorbell, No Battery, IP68 Waterproof, 4 Volume Levels, 1000ft Range | Best Buy