Buy from Amazon.com : http://fave.co/1CGBeev <br /><br />Sena Bluetooth Audio Pack with Waterproof Housing for Gopro Hero3 and Hero3 Hero4 Built-in<br /><br />Product Description : <br />Compatibility Gopro Hero3 and Hero3 <br />Talk time 3 hours <br />Stand-by time 3 days <br />Working distance intercom up to 100m 32808 in open terrain <br />Operating temperature -10 to 55 degC 14 to 131 degF
