Nirsom Plug-in Type Digital Wireless Remote Control Sensing Doorbell with IP44 waterproof doorbell button, Operating at 300M range with Flashing Light & 52 Different Melodies for choice, 2 receivers and 1 button (White) QUICK & EASY TO INSTALL IN MINUTES- Setup literally within minutes of opening the packaging and is suitable for long range [900ft] in any home or business WILL ALERT YOU AT ALL 4 VOLUME LEVELS - Loud enough to hear at any of the 4 levels of volume and low enough so it won't disturb any sleeping children. OVER 50 CHIMES INCLUDED - Pick one you like from modern to old fashioned chimes - makes a great gift for family/friends & co-workers COMPLEMENTS ANY DOOR WITH LIGHT FEATURE - Which also includes 2 types of fixing options to the push button unit, self-adhesive or screws both easy and quick to install 100% SATISFACTION MONEY BACK GUARANTEE - When you order today you'll get the highest quality product, as well as outstanding customer satisfaction which we take extreme pride in. Our number one goal at Rage Systems and our products we offer is we have a no questions asked money back guarantee if you're not completely 100% satisfied. If for some reason they is a problem with the product we'll even offer a replacement if you would prefer.