These wireless sport earphones combine stylish design with professional performance, ideal for fitness enthusiasts and daily users, and are available for shipping to the United States. With compact dimensions of 3.19×3.19×1.57 inches and a lightweight 0.1100 lb (17g), they are portable and comfortable for all-day wear. Equipped with advanced Bluetooth 4.1 (CSR Chip) and multi-point technology, they can simultaneously connect to two mobile devices, delivering high-speed, stable signal transmission within 32.8ft (10m) without barriers. Featuring CVC 6.0 noise cancellation and a high-sensitive microphone, they effectively reduce ambient noise, capture clear voice details, and paired with advanced aptX codec, provide pure, CD-like stereo sound for compatible devices. The earphones come with 3-size (S/M/L) ear tips and secure ear hooks, forming a passive noise reduction seal and ensuring a snug, stable fit during workouts. In-line controls include an MFB button and volume/track adjustment keys, enabling one-click operation for hands-free calls, play/pause, pairing, power control, and even remote camera control. Powered by an 80mAh rechargeable battery, they offer 4.5 hours of continuous music/talk time and fully charge in just 2 hours. Sweat-proof PC material protects against corrosion, and the included portable carrying case (only 0.37lbs) with a charging cable makes them easy to carry on the go. Complete accessories meet all daily use and replacement needs.