Krismile&reg; Wireless Doorbell with 1 Remote Button and 1 Plugin Receivers Operating at over 250-feet Range with Over 10 Different Chimes (White) Features include: Wireless Design Range is approximately 250-Feet Ringer includes adhesive back for easy mounting Transmitter requires one 12 volt battery (included) Choose from 10 different chimes Chimes can be set to High, Medium and Low volume settings Easy to You can install the doorbells in locations, such as kitchen, back yard, bedroom, etc. Chime measures 3875 x 2625 x 1-Inch Ringer measures: 875 x 15 x 275