Teeth Whitening Light by Starlite Smile. 16 LED Teeth Whitener w/ 3 Adapters for iPhone， Android &amp; USB (compatible with 4G and newer). Works w/...<div style="text-align: left;"><strong>[Product Information]</strong><ul><li class="showHiddenFeatureBullets"><span class="a-list-item"> 16 BRIGHT LEDs and 3 ADAPTERS for iPhone， Android and USB (compatible w/ 4G and newer). </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> NO BATTERIES and NO EXTRA TRAYS -- this unit IS the tray. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> ENHANCES GELS OR STRIPS to break down stains on the tooth surface and accelerate the process of whitening teeth. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> LARGE TRAY AREA keeps gel from leaking on to the gums. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Works with Teeth Whitening Strips or any Teeth Whitening Gel (sold separately). 480nm wavelength shown by Harvard to prevent/treat GUM DISEASE and PERIODONTAL DISEASE. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51hIkeB%2BBrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41A2%2BbbHiTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41V9KgTSKtL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41GpaCw7uGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51R0kAzKvTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41V35XrmZIL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21T95tgafKL.jpg" noproxy>