Ultra Portable- Designed to be comfortable to carry with no edges, fits easily into your bag or pocket,much better for your life, travel & hiking. Full, High-Definition Sound- The design of the power of turbo-charging cavity is more favorable. Enjoy a penetrative clear sound quality and robust bass . Stylish & Compact Design- It's simple, beautiful, small, stylish and popular.Cylindrical microphone design can reduce background noise during voice calls (speakerphone must be within 20cm). Universal Compatibility- Our speakers can be paired with all types of devices-- smart phones, tablets and laptops with bluetooth built-in. Transmission range: 8~10m (with no obstructions) . Long Time Battery- Built-in rechargeable lithium battery offers 6 hours of playtime, allowing you to enjoy the good music for a long time and relax yourself.