Main Features: Double earplugs design, elegant appearance. Dual Micro USB charging ports. Light weight and portable, easy to carry. Suitable for all Bluetooth enabled device. High-fidelity stereo music and clear speech, you can begin enjoying CD quality stereo sound Top-level CSR8635 Bluetooth chip, more clear conversation and stereo music. Awesome wireless earbuds with free switching of double ear piece into a single side makes you enjoy an pleasant experience during your journey. Dual batteries, ultra-long standby and working time ( listening music up to 6 hours ). The head of the earphone can be pulled out and transferred from double earphones to single earphone freely. Clear sound and noise cancellation, bluetooth 4.0 noise cancellation, lasts close to 240 hours standby time, 6 hours of music time, which makes you do not worry your bluetooth when you are enjoying camping, hiking or other great outdoor activities. Compatible with iPhone 5S 5C 5 4S 4, iPods, Samsung Galaxy Note 3, Note 2, S5 S4, S3, S2 most Android smartphones and other bluetooth-enabled tablets,support call answering. The two sides of the headset ( left and right) both have one battery, you need both charge them before using.