YCZ White Wireless Waterproof Remote Reception Dull Polish Doorbell Operating at over 500-feet Range with Over 50 Chimes, No Batteries Required for Receiver Great touch sensation with matte texture, touch design for this wireless doorbell. 2. High quality for you to have one, as it is more sensitive, more stable, and power effective. 52 different ring tones. Four levels of adjustable volume from 25db to 110db. Includes 1 plugin receiver unit and 1 remote transmitter button, double sided sticker, anchors, screws, and battery for remote transmitter. Easily plug receiver into an electrical outlet (no batteries required for main receiver).High quality for you to have one, as it is more sensitive, more stable, and power effective. IP44 rated push button(transmitter) is splash proof and is painstakingly made to withstand rain, wind and other weather elements,Superior ABS material without harmful substances such as lead and carcinogens, it is environment friendly.