Honeywell Premium Portable Door Chime， 3 Push Buttons<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Plastic</li><li>Imported</li><li>Wireless - Battery operated</li><li>Works with up to six (6) push buttons， motion detectors or door contacts for added security and convenience</li><li>Six (6) chime tunes， fully adjustable volume and six (6) visual alert icons</li><li>Self learning code system automatically adjusts to eliminate interference</li><li>450-ft operating range</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41TbmiRWCrL.jpg" noproxy>