– Awei AK3 Bluetooth Sports Earphone running with Bluetooth headset uses 6mm copper ring coils, strong rubidium boron magnets and high class carbon fiber diaphragms. This Earphone comes with 2.402GHz – 2.480GHz Wireless frequency range, 20Hz – 20KHz Voice frequency range. It take 2 hours for Charging time and provides 12 hours Talking time, 10 hours Music playing time, up to 240 hours Stand-by time. This Bluetooth earphone comes with 20Hz – 20KHz Voice frequency range, 2 x 65mAh rechargeable li-ion battery (built-in),A2DP, AVRCP, HSP, HFP Bluetooth protocol. Ergonomic ear hook design with silica gel, lightweight and flexible for durability and portability. You won’t get discomfort even after hours of use, perfect for jogging, running, hiking, etc. And multiple ear caps ensure the best possible fit for any set of ears. With Bluetooth 4.1 technology is faster than other devices, the transmission distance is up to 10m. Enjoy perfect compatibility with iPhone, iPad, Android smartphones and tablets, windows devices, and all popular Bluetooth devices Deep low frequency, solid medium frequency, more abundant high frequency details. Beautiful voice and music silkily fall in ears and keep in memories. With its IPX4 waterproof performance. With Bluetooth 4.1 technology this earphone is faster than other devices. Enjoy perfect compatibility with iPhone, iPad, Android smartphones and tablets, windows devices, and all popular Bluetooth devices. It is Gently absorb or separate to turn the earphones on / off, abandon traditional button, novel and simple Its magnetic attraction design function can connect 2 earphones easily. Hanging on neck like a necklace when not in use could avoid loss meanwhile it could be a cool amazing accessory for users.