KFLY Universal Sports Bluetooth Wireless Headsets, Neckband Style, Practical Use (Blue) Bluetooth Headphones are ideal for gym use, cyclists, runners, tri-athletes, walkers, hikers, or any kind of workout. Wireless Bluetooth stereo headphones for streaming audio from compatible mobile phones, PC, laptop, tablet and MP3 players. High sensitivity, omni-directional microphone design, clear voice, no echo. With microphone, control button totally hands-free for smart phones. conversationor or control the volume / next track / pause music. Behind-the-head design eliminates wires and provides a light, comfortable fit.