On-the-go Charging – A single 1.5-hour charge provides the Sport Series Earbuds and their powerful Lithium Polymer 70 mAh battery with up to 6 hours of HD Bluetooth 4.2 play and talk time for any iOS or Android smartphone or other Bluetooth-enabled device. A Micro-USB cable is provided for easy charging wherever a standard USB port is available, so you will always have enough power for even your longest workouts. Conveniently Magnetized - The Sport Series Wireless Earbuds are designed with magnetic power to enforce that the pair remains stuck together when not in use (so they never get lost and separated in a messy gym bag). Unlike larger headphones that might be cumbersome during a workout, they are made to wrap around a user’s neck like a necklace, and when done so they remain stable and easily accessible. Customized Comfort – In addition to the supportive wing that keeps your earbud stable while moving, each pair of Tzumi Sport Series Wireless Earbuds comes with three sizes of soft silicone tips which can easily be switched out to provide you with the best fit for your ear. By using the most appropriately sized tip, you’ll receive a better noise-canceling effect tailored to your body. User-Friendly Controlling - The Sport Series Wireless Earbuds are designed for easy handling during a workout: users can make their calls and play/pause with the touch of three large buttons for volume and playlist control.  Number of Batteries: 1 Included: 1 Usb Cable(s), 1 Pair(s) of Headphones Features: Noise Cancelling, Bluetooth Compatible Impedance: 32 Ohms Manufacturer Warranty: 1 Year Labor Limited Power Source: Battery (included) Measurements: 4.2 Width/Inches, 1.2 Length/Inches, 6 Height/Inches Cord Length (ft.): 2 Ft Minimum Frequency Response: 20 Hertz Weight (lb.): 0.5 Lb Country of Origin: Imported