SadoTech Model CX Wireless Doorbell with 1 Receiver Plugin and 2 Remote Buttons Operating at over 500-feet Range with Over 50 Chimes, No Batteries Required for Receiver, (White) AS SEEN ON BUSINESS INSIDER, FOX, ABC, NBC & CBS News - "It's built well, and it has a nice minimalist style" - Business Insider, 08/21/15. Our doorbells are great looking, loud, and reliable. DOWNLOAD OUR "10 MORE WAYS TO USE SADOTECH DOORBELLS GUIDE - Did you know that our customers use SadoTech doorbells to train dogs, teachers love using it to quiet down classrooms, seniors and disabled use SadoTech doorbells as assisted living call pagers, and more! SCROLL DOWN on this page to the Technical Specs section below and click the Application Guide link to DOWNLOAD the PDF file. Open it with Adobe Acrobat Reader. Cool - 2 transmitter buttons. Install one button for the front door and one for the back door. Each button can be configured to sound off a DIIFFERENT alert chime so you know which door to open. Now thats smart! A practical use case scenario for this product might be if you have an elderly care patient that needs to be able to ring/alert a single main chime unit from two rooms. Another usage scenario for this remote doorbell may be for a small shop that has a front door and back door. WANT TO LISTEN TO OUR CHIMES/RINGTONES BEFORE YOU BUY? GO AHEAD - Just SCROLL DOWN to the Technical Specs section below and click on the Specification Guide link to DOWNLOAD the PDF file. Open it with Adobe Acrobat Reader to play all 52 ringtones. Were proud to announce weve developed a custom music chip in our doorbells that includes carefully selected. Over 50+ different ringtones. Operating range of over 500 ft (1000 ft in open area). 4 levels of adjustable volume from 25db - 110db. Remote transmitter button is weatherproof and acceptable for outdoor use. Easily plug receiver into an electrical outlet (no batteries required for main receiver). Our wireless door bells & chimes are CE, FCC, RoHS certified. Includes 1 chime unit and 2 remote transmitter buttons, double sided sticker, anchors, screws, and battery for remote transmitter.