Included in Package – 1 battery-operated receiver (150ft. range) and 1 push button with CR2032 battery and mounting hardware. Melody Selection – Choose from 4 different volume options and 2 different melodies including ding dong and Westminster. Easy Installation – The push button comes already paired with the receiver, and mounting instructions are included for both the push button and receiver, which operates using 3 AA batteries (not included). Never Miss a Visitor – Always know when your guests arrive with this battery-operated wireless door chime kit. Each doorbell receiver can pair with up to 4 push buttons. Each push button can pair with up to 4 receivers. Classic Style – The subtle styling and classic appeal of this bright white doorbell kit make it a must-have for homeowners, business owners, builders or DIYers.