Marsboy CI142 Wireless Bluetooth V4.0 Swift Sports Sweatproof Stereo Earphones (Green) Wileless Bluetooth earbuds: CSR8635 Bluetooth 4.0 Chip - Ensures excellent sound quality for music enjoyment and hand-free phone calls. Bluetooth Earbuds: Sixth Generation CVC Smart Noise Control - Reduces noise disturbance so you can enjoy a clear sound track. Sport earphones sweatproof: Guarantees stable and comfortable wearing when exercising, running, climbing, driving, skating,camping, fishing, etc. Universally Compatible - Suitable most Bluetooth-enabled devices. Such as iPhone 7 plus 7 6s plus 5S 5 4S and Android smartphones,Samsung Galaxy Phones and so on. Flat Line Design Adopted - Avoid the disturbance of twining wires and enjoy sport activities freely. Product comes with 12-month warranty. 24/7 customer service available.