Vodeson Multipurpose Wireless Doorbell, 500 feet, 3 Levels Volume, 36 Chimes, Black WIDE RANGE: Up to 500-feet (150 meters) range at open area.CE, FCC, RoHS certified. LOUD VOLUME: 36 different chimes and 3 levels of adjustable volume from 60db to 120db. Never miss any visitor. WATERPROOF: The push button is rated IP44, Water-resistant from water or rain as long as you do not put it into water for a long time. EASY TO INSTALL & USE: Install it with 3M double-sided tape or screws and anchors. No wires required. CUSTOMER SERVICE: Ready to respond within 24 hours, providing you with 18-month warranty with 30-day money back guaranteed.