PHYSEN Europe Style Piano Wireless Doorbell kit with 2 Bionic Buttons and 3 Plugin Receivers Operating at 1000ft Range,4 Volume Levels and 52 Melodies Chimes,No Battery Required for Receiver Wireless doorbell with high-end cross appearance---Home use doorbell,simultaneously also can decorate your home and like a cross to bless your family safe. Ultra water resistant touching push button ---Can be mounted indoors or outdoors,touching button also enhance your use experience. Easy installation with a wireless range of up to 1000 feet ( in an open area)---Wireless range varies depending on construction and materials,do not mount the push button on metal materials. Adjustable volume level to suit your needs;52 chimes allow you to change the tunes with your mood as well as set tune to a specific push button. Flashing light to catch the eye when the doorbell is pushed. CE, FCC, RoHS certified.