Sena Snowtalk Ski and Snowboard Bluetooth Helmet Headset and Intercom Getting out on the mountain no longer means disconnecting from your world. With a Bluetooth-equipped mobile phone in your jacket pocket and the Bluetooth 3.0-equipped Snowtalk speakers tucked into the ear pockets of your helmet, you can take phone calls, enjoy conversations over four-way intercom capability that works over a 700-meter (760 yards) range, or listen to and share music with your buddies. Advanced Noise Control - Snowtalk delivers crystal-clear, natural sound that gets an automatic boost in noisy environments, while Advanced Noise Control technology cuts down on background noise for both incoming and outgoing audio. Only two winter glove-friendly buttons - Even with winter gloves on, operating the Snowtalk is a cinch with only two large buttons controlling all functions. Meanwhile, six hours of talk time and six days of stand-by time should give you plenty of use on the mountain. Free firmware upgrades for life - All registered Sena owners get access to free firmware upgrades, which ensure your Snowtalk is always operating with the latest software updates. Note: Headband is for use without a helmet, the large headband fits 59-61cm head sizes. The speaker set for helmets is the same size and fits all ski and snowboard helmets with audio pockets