MIXTRONIX Bluetooth Wireless Headphones, 4.1 Noise Cancelling Sports Stereo Headset, Sweatproof Earbuds with Mic, Secure Fit Sport Running Earphones SUPERIOR QUALITY: Your Mixtronix Bluetooth headphones V4.1 + EDR features a 2.4GHz-2.48GHz frequency range, High-end CSR 8635 chipset, CVC 6.0 noise cancellation technology for intelligent ambient noise filtering thats perfect when taking calls. Forget tinny, muffled music on your sport headphones. You'll get big, booming bass and bright, crisp midrange sound with these wireless earbuds! PAIRS PERFECTLY WITH ANY 2 DEVICES AT A TIME: Your Mixtronix Bluetooth wireless headset pairs quickly and easily with your Smartphone, iPad and other tablets, iPod and other Bluetooth-enabled devices. Even better, these wireless headphones let you pair with two Bluetooth devices at the same time so you can take calls and listen to music without the hassle of reconfiguring your workout headphones between use! LASTS A LONG TIME BETWEEN CHARGES: Up to five hours of battery life between charges for your Bluetooth headset means you won't have to worry about your Mixtronix wireless earbuds dying when you're out for a run, at the gym, or anytime you're using them away from home. These are great sports headphones! STAYS IN WHEN YOU RUN: Don't you hate it when your earbuds pop out while you're on a call or listening to your favorite song? Talk about frustrating! Your Mixtronix running headphones come with three different sized earbuds so you're guaranteed a perfect fit! 100% SATISFACTION GUARANTEE: We offer a Mixtronix 365 day Replacement Guarantee on this Bluetooth headset. If you're not absolutely thrilled with your wireless Bluetooth earbuds, simply let us know within 365 days of purchase  that's a full calendar year  and we'll cheerfully refund every penny of your Mixtronix purchase!