Magicfly Expandable Wireless Doorbell Kit Operating at 1000 ft Range with Over 50 Chimes Doorbell Chime Alert System [2 Remote Button Transmitter &amp; 2 Plugin Receiver]， Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>52 (16 chord) elegant melodies</li><li>Stable Wireless transmitting Range: 200 meters (300 meters at open area);</li><li>Excellent materials keeps itself from getting higher temperature &amp; interference;</li><li>Easy installation; convenient; double-side stickers;long lifetime;; It is easy to DIY; Super power-saving mode;</li><li>Certifications: All products passed CE， FCC， RoHS approval.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41NbTFbmrJL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41lXKhn576L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41IYRIPA5QL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41UcrS45-FL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51qz4WWyMYL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ZjI16XQdL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/413fF74uElL.jpg" noproxy>