Flexzion Wireless Door Bell Set 1 Remote Control and 1 Digital Receiver Doorbell with 10 Different Chimes and LED Indicator 250ft Operating Rang Adjustable Volume 12V White Installs quickly without the hassle of running any wires Just mount the transmitter near your door and place the receiver anywhere in your home within 250-Feet When the transmitter button is pressed one of ten pleasant rings of your choosing will sound to notify you of your visitor's presence Choose from 10 different chimes, chimes can be set to High, Medium and Low volume settings Ringer includes adhesive back for easy mounting; Transmitter requires one 12 volt battery (included) and chime requires 3 "AA" batteries (not included)