Hinpia Sport Bluetooth Earbuds, Stereo Wireless Headphones with 4-Hour Playtime and CVC 6.0 Noise Cancellation, IPX4 Sweatproof In-Ear Earphones for Work Out, Gym and Running with Mic Comfortable Fit with Sport StyleCVC 6.0 Technology Noise Cancelling & Sweatproof design guarantee 100% stable and comfortable wearing for running, cycling, Gym exercise and other outdoor sports.What's more,Wearable for long periods without irritation. Bluetooth 4.0 with Apt-X TechnologyEasy pairing with smartphones, tablets and other Bluetooth enabled music devices; Apt-X codec provides pure, CD-like crystal clear sounds via noise reduction and high-fidelity stereo music. Strong Wireless SignalYou would enjoy skip-free music between 10meters distance with an outstanding signal. Excellent Battery PerformanceUp to 5 hours of continuous talking,4 hours music time and up to 160 hours of standby with a single charge, only 1 hours for charing time. Get Your Best Fit This Bluetooth Headphones comes with 3 different sizes of ear buds and 2 different sizes of ear hooks so that you can try different permutations and combination to find the best fit for your ears. What's more, the ear buds are updated to be softer and stickier to your ears, which are more comfortable to wear.