The Cardo Pack Talk Slim motorcycle helmet communication system boasts a super slim design for an unobtrusive look. It offers up to 15 rider multi-intercom simultaneously with music and radio sharing - ideal for large groups. It is fully waterproof with a built-in FM radio with 6 pre-set stations and is compatible with the Cardo Connect app. It offers a DMC intercom range of up to 1.2km / 0.8 miles, and the intercom range can be extended up to 8.0km / 5 miles (range extended when between a minimum of 6 riders). The Pack Talk Slim also offers automatic volume control for ease of use and powerful 40mm JBL-designed speakers for crystal clear audio. It has an 850mAh battery with a talk time of 13 hours and gives status announcements such as battery warnings. It takes roughly 4 hours to fully charge up and is ultra-easy to use. It has two audio channels for mobile and GPS for convenience and offers a universal Bluetooth 4.1 connection.