SUPEREX&reg; Wireless Bluetooth Sweatproof Earbuds Noise-Cancelling Headphone CRS8636 Headset with Microphone for Mobile Office/Sport - Green Excellent Music Performance and Superior Sound Canceling: CRS clip will offer excellent listening and calling experience. IP6 Waterproof: allow you to use it in heavy rainy day, better performance than normal earphones Ultra Strong Battery Performance: Built-in 80mAh Polymer lithium battery, support up to 8 hours of calling time, 6 hours of music time and 120 hours of standby time. Stereo and Surround and Ergonomic earbud design: offer amazing listening experience and comfortable to wear. Storage Bag: easy to pouch and carry, make your bag neat,never worrying about missing.