The Sena SMH-10 is a premium long-range Bluetooth communication and multimedia stereo headset designed for Bell Mag-9 helmets. It allows for bike-to-bike or rider-to-passenger communication and features hands-free calling, stereo GPS instructions, and four-way intercom conversations up to 980 yards in open terrain. The versatile Jog Dial ensures easy operation. The battery provides up to 12 hours of talk time and can be fully charged in 2.5 hours via a micro USB port, which also allows for firmware updates. The unit is water-resistant for use in inclement weather.