Linear Act-34B 4-Channel Keychain Transmitter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Compatible with all Linear access receivers &amp; controllers</li><li>Quick-disconnect key ring</li><li>Factory programmed MegaCode format supports more than 1 million codes</li><li>Includes two 2016-type lithium batteries</li><li>Operating freq: 318MHz</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31uRwc0onXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41gDJkeWfNL.jpg" noproxy>