IPS Wireless Doorbell Door Chime Kit Portable Waterproof Push Button over 900ft Long Range 4-Level Volume & Blue Light 36 Melodies to Choose 2 Plug-in Receivers & 3 Transmitters Long Range: Wireless range up to 900 feet in open space, long enough to mount the doorbell kit as your will. Do not miss any visitors. It can be used as paging devices for residents care and the elderly care. 36+ Melodies: Different sounds that you can easily choose, by pressing the music key on the receiver. 4 adjustable volume levels by 25db to 110db Easy Installation: Without the hassle of cables. Just plug the receiver into an electrical outlet and mount the transmitter (including battery) via the double-sided tape or screws. Design: Wireless Doorbell with elegant stylish look --- Use bell at the same time and can also decorate your home. CE, FCC, RoHS certification. Package including:3 x Push Button (Transmitter) with battery, 2 x Plugin Chime (Receiver), 3x Double sided sticker, 3x Anchors and screws,1x Screw tool.