Spigen E100W Wireless Doorbell with 1 Button/Transmitter and 1 Ringer/Receiver and 1000 Feet Range with Over 50 Chimes Spigen's Original Doorbell Model E100W with stylish modern design Operating range of over 500 feet (1000 feet in open area). Remote transmitter button is rated IP55 weatherproof and acceptable for outdoor installation. Over 50+ different ring tones. Customize your rintones depending on seasonal holiday! Four levels of adjustable volume level. Soft sound to Loud sound depending on your preference Includes 1 plugin receiver unit and 1 remote transmitter button. Button is installed with double sided 3M tape, Anchors or Screws. Wireless range up to 1000ft Waterproof with blue LED push button No batteries necessary with plug in receiver High quality speaker and sound