Our wireless sport earphones adopt advanced Wireless V4.1 with multi-point technology, connect with 2 mobile devices simultaneously, high-sensitive inbuilt mic with CVC noise canceling technology, deliver crystal clear stereo sound. Inbuilt 80mAh rechargeable battery and equipped with USB charging cable, 4.5 Hrs unstoppable HD sound music while only 2 Hrs fully be charged. Its auricle ear hook design snugly fit your ear with S/M/L-size comfortable ear tips, secure and stable. In-line remote butt