Sound Intone FB10 Lightweight Wireless Bluetooth V4.0 Headphones Ear-hook Earphones With Built-in Microphone For Sports Exercise Jogger Hiking Running for All Bluetooth Devices(Black/Yellow) 1.Adjustable Ear-hook design and In-ear earplug design ,will assure it stay in your ears when you Sporting and reduces outside noise to help you focus. 2.Bluetooth 4.0 high-quality and lower power-consumption chip , between 6-8 hours of continuous calling and playing time 3.The appearance of unique design is clear and generous, cultured vogue;with Multifunctional keys. 4.Lightweight design convenient to carry and save spaces, Comfortable and secure in the ear ,providing the top audio enjoyment 5.With High quality HD microphone and pronunciation unit, clear call quality.