Lantoo Wireless Doorbell Chime, Waterproof Doorbell Kit with 2 Plug-in Receiver & 1 Remote Push Button Transmitter, 1000 Feet Long Range, 52 Chimes, 4 Volume Level, LED Flash LONG RANGE WIRELESS DOORBELL: Operating range up to 1000ft/300m in open area ensures you to hear the bell and answer the door in time. 52 DIFFERENT RINGTONES: 52 different ring tones with 4 levels of adjustable volume from 25db to 110db. Flashing light with audio alert indicators which is easy for people including the hearing impaired to notice. EASY INSTALLTION: Easily plug receiver into an electrical outlet (no batteries required for main receiver). The push button can be fixed to the doorframe with the attached adhesive tapes. The push button is rated IP44 weatherproof and acceptable for outdoor use. Flashing Light: The transmitter button will flash blue light to add additional alert. The receiver will flash white light to give them a friendly hint. Package Includes & Warranty: 2 plug-in receivers, 1 remote transmitter push button(12V 23A alkaline battery included), 1 double side stickers, 2 x Screws; 2 x Anchors and user manual. 100% Money Back or Free Replacement GUARANTEE to Every Purchase in Lantoo.