SUPEREX&reg; Wireless Bluetooth Sweatproof Earbuds Noise-Cancelling Headphone CRS8635 Headset with Microphone for Mobile Office/Running/Gym/Exercise/Sweat proof for IOS Android and Windows Device - Black Stylish Design: fashion looking will offer you a better mood when sporting or working. Light Weight and Simple Control: less pressure on your neck as well as easy to storage, also easy to use. Excellent Power Performance: Built-in 80mAh Polymer lithium battery, support around 6 hours talking and playing time, and about 150 hours standby time. High Bass Performance and Superior Sound Canceling: offer good listening experience. Storage Bag: easy to pouch and carry, make your bag neat,never worrying about missing.