Compact, modern, powerful, and expandable, the TPS fills a small package with sleek design, big sound, and a slew of features. Headed to the beach or out for a skate? This tough aluminum body is built to resist sand and debris. Out for the day? The six-hour battery has you covered. Need even more volume? Link two together and experience stereo sound in a big way. Features Works with all media players and notebook computers Rechargeable lithium-ion battery provides up to 6 hours of playtime Extruded aluminum body with sand resistant grill Interconnect two units for enhanced stereo separation and volume Integrated cable management system