Heath Zenith SL-7762-02 Wireless 2-Button Door Chime (White) Off-White Molded Cover Up to 150-Feet Transmission Range 8 Note Westminster or 2 Note Melody for Front Entrance and 1 Note for Rear Entrance Heath Zenith SL-6162 Wireless 2-button Door Chime Includes: 1-Battery-operated wireless chime, 1-Wireless push button, 1-12V A23 battery for push button, 1-Hardware pack