AuYou Doorbell wireless Long Range Alert System 1 Plugin Receivers and 1 Remote Control Transmitter,Modern Home Decoration Doorbell Kit quick install MULTI-CHOICE RINGING: 36 different stereophonic music choices; 3 different adjustable volume levels (low/medium/high;85db) to fit varieties of conditions SAFE: the push button is rated IP44 waterproof for outdoor use; CE/FCC/ROHS certified; ABS material anti-burn and impact resistance FASHION DESIGN: doorbell push buttons to feel good; smooth curve surface fit your house's or apartment's decor; easy to install(mount or stick on wall) APPLICATIONS: GUEST VISTING; CARETAKING (easy for a patient to call their caretaker while the caretaker doing cooking or cleaning in the room); DELIVERY( it audibly rings when delivery courier comes and you're away from the front door) PACKAGE: receiver x 1; button x 1; button battery x 1; screws x 3; anchors x 34; double-side sticker x 1; User Manual x 1