Audiosharp AS1206 Sports Lightweight Wireless Bluetooth V4.0 In Ear Headphones with Microphone Mic Volume Control for Running Gym Exercise (Red) A perfect combination of both exercise and music enjoyment, convenniet and efficient hand-free calls by wearing the right alone and wonderful music experience in both ears. Multi-point pairing allows you to connect two mobile phones simultaneously, ergonomic design keeps a comfortable wearing and easy adjustment that is sutable for running, gym, exercises and any other sports. Adopts the latest top-level bluetooth chip going with hi-fi audio technology which accurately distinguishes L&R channels for a full bluetooth stereo and more prevalent bass. Initiative and superior butterfly styled symmetrical design guarantees a symmetric stereo bluetooth sound and that the monaural and binaural mode can be switched freely through plugging in wires and unplugging. Dual-power support for outstanding duability and over 10 days standby time due to one lithium battery for each earphone which realizes over 6 hours of listening to music at top volume with an advanced 4.0 chip to achieve ultra-low power consumption. AUDIOSHARP FEATUES: A Our products are designed by rigorous professional inspection,Covered under the audiosharp 1-year warranty.