Bluetooth Headphones V4.1 Sport Stereo In-Ear CVC 6.0 Noise Cancelling Wireless Earphone with Mic, Adjustable Earhooks, IPX4 Sweatproof , Premium Sound with Bass, Running Earbuds, Secure Fit - Black TOP QUALITY AUDIO: CVC6.0 Echo reduction + DSP digital noise reduction technology delivers astonishing acoustics, provides you a superior quality stereo music, crystal clear sound POWERFUL BATTERY: Up to 8 hours of talk/playing time on a full battery charge. Super quick charge time of only 2 hours which lasts up to 180 hours of standby time EASY BLUETOOTH CONNECTION: Bluetooth V4.1 technology, compatible with all android, Apple and all bluetooth enabled devices, this wireless headphone offers with up to 32 ft bluetooth range SWEAT-PROOF DESIGN: IP4-rated Sweatproof design is built for activities like running, jogging, hiking, biking, gym, cycling, Yoga,etc 5.ADJUSTABLE EARHOOKS: Two Earhooks can be adjusted freely to 0.5 inch length, best fit for different size of ears, to make it more stable. 4 sets different sizes of earbuds ensure the snug fit for different sizes of ears