Jaybird Freedom Sprint Bluetooth Headphones - Retail Packaging - Midnight Black JF4MBL Premium Bluetooth Earbuds for Wireless Music/Phone Calls featuring patented Secure Fit Sport ear cushions. Comfortable, secure fitting, small and fashionable bluetooth earbuds for active sports are 40% smaller than our Jaybird JF3 Freedom Bluetooth earbuds Official Training earbud of USA Triathlon with Lifetime Gurantee against damage from sweat. On-ear music/call controls help avoid removing earbuds from ear or dealing with tangles wires while enjoying your favorite sports activitiy. 4.5 Hour battery life from rechargeable Lithium Ion battery