MuchBuy New Home Security Digital Wireless Doorbell 38 Tunes 80m Us Features include: Wireless Design Range is approximately 250-Feet Choose from 10 different chimes Chimes can be set to High, Medium and Low volume settings Easy to install Chime measures 3875 x 2625 x 1-Inch Ringer measures: 875 x 15 x 275 Ringer includes adhesive back for easy mounting Transmitter requires one 12 volt battery (included)