Operating range cover over 1200 feet, Remote transmitter button is rated weatherproof and acceptable for outdoor use
38 different chime ring tones are selectable. 3 levels of adjustable volume of indoor receivers from 60db to 120db. All-day anti-interference system prevents the interferences of neighbors wireless doorbell
No batteries required for receivers, easily plug into an electrical outlet（AC outlet of US standard）. One 12V/A23 battery included for outdoor transmitter.
Indoor receivers can work well at any places of your house: rooms at first floor, second floor and higher, living room, dining room, basement, garage, kitchen, back yard, bedroom, bathroom, etc