RICHEN Wireless Bluetooth Sport Headphones Noise Cancelling Headset W/Microphone [for Running Sports Gym Exercise Sweatproof] Compatible with iOS&Android Devices(RI-RQ7-B) RICHEN Brand Certified: Top-Brand Bluetooth Accessories for Smartphones. With bluetooth CSR8635/V4.0 + EDR (fully backward compatible) for longer playing time, the Swift headphones ensure high-fidelity stereo music and clear speech via Noise reduction. Strong Wireless Signal: you can enjoy skip-free music in a 10-meter operating distance, even if use your music devices left/right side, above/below waist. Exercise-proof design guarantee 100% Stable and Comfortable when exercising, running, climbing, driving, skating,camping, fishing and other outdoor sports. Small,medium and big size earhooks included. Universally compatible with most Bluetooth-enabled phones.And built-in extra-long battery allows up to 4-6 hours talking/playing time and 150 hours standby.