Outdoor Tech OT0032 Chips - Universal Wireless Helmet Audio System (Black) Wirelessly delivers Hi-Fi sound into your helmet using its 40mm drivers & built-in microphone. Patented 2-button control system allows you to adjust volume, change tracks, play/pause music, and answer calls from outside your helmet knit without removing your gloves. Rechargeable lithium-ion battery for 10 hours of play time, and 280 hours of standby. Rugged, minimal design fits into virtually any helmet designed to take audio drop-ins. Meets IPX-4 sweat and water resistant, and works perfectly at -20Degree C/-4DegreeF. Includes: USB charging cable, backup audio line- in cable w/ controls, carry pouch, and instruction manual.