Better Sound Quality: CSR 4.1 bluetooth chip and A2DP noise cancellation technology is applied to guarantee that you can enjoy HIFI stereo sound from smartphone/tablet or any bluetooth-enabled devices. Long Playing Time: Built-in 300mAh battery ensures up to 10 hours working time, you can enjoy wireless free all day long. Only needs about two hours to fully charged. Easy to Use: Pair it with your bluetooth-enabled phone, tablet or laptop, and plug your headset or connect it with the speaker (without bluetooth function) via 3.5mm audio cable, then you are free to listen to music. Dual 3.5mm Aux Output: With two aux output ports, you can connect two speakers headphones or other devices at the same time. It can transmits up to 20 meters (66 feet) away with line of sight. Wide Compatibility: It is compatible with most smartphones and Bluetooth electronics, ideal for home or vehicle audio systems and portable audio devices.