AuYou 300-feet Long Range Doorbell Alert System Kit, 36 Tune Melody White Wireless Ring Door Bells with 2 Remote Button Transmitter and 1 Receiver 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); two buttons can be installed on the front door, back door or in the yard SAFE: the push button is rated IP44 waterproof for outdoor use; CE/FCC/ROHS certified; ABS material anti-burn and impact resistance MULTI-CHOICE RINGING: 36 different stereophonic music choices; 3 different adjustable volume levels (low/medium/high;85db) to fit varieties of conditions 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 2; button battery x 1; screws x 4; anchors x 4; double-side sticker x 2; User Manual x 1