Anesty Wireless Doorbell Door Chime, Operating At Over 900-feet(280m) Range with 48 Different Ring Tones -White Doorbell kit of 1 push button and 1 chime supports a wireless range of up to 900 feet 280 m. Offers a total of 48 chime tones, including the traditional Ding Dong, and 4 levels of adjustable sound volume(0-80 dB) FCC, CE and RoHS certified; IP44 rated push button(transmitter) is splash proof and is painstakingly made to withstand rain, wind and other weather elements which is acceptable for outdoor use. Anti-harassment Technology - A specially designed coding system ensures there is no interference to or from any nearby wireless products. Anti-harassment design, one by one ringing. Energy Saving - Battery have 1 year life. Advanced Design - Blue LED flashes when someone is at the door; sleek design easily blends with the decor of your home Easy installation - Push button can be fixed to the door frame with the screws provided, or attached to the wall using double-sided adhesive tapes outlet in your home