QC 10 Headset- Bluetooth 4.1 technology Ensures perfect stereo sound quality with High Bass. Comes with balanced left and right stereo channels. Super Signal supports operation with in 5ft. Built-in HD Microphone. INNOVATIVE ERGONOMIC DESIGN: With soft smooth silicone gel surface, this Bluetooth headphone is designed to naturally fit the contours of your ear. Different sizes of earbud tips are provided to guarantee constantly comfortable feeling. QC-10 Bluetooth Earphones was designed for sports usage , made by waterproof material, ergonomic innovative and waterproof sweatproof design, Ensures this headset is comfortable and secure for sports ,running ,jogging ,walking ,exercising,etc.BUILT-IN MIC - Stylish looks and built-in Bluetooth chip with HiFi Stereo earphones, ensures you could enjoy high quality stereo bass sound. Mini Portable Wireless headsets with built-in microchpone.