Experience superior sound quality and convenience with the Wireless Headset. This ultra-compact headset offers stereo sound and is designed for comfortable wear over the ear. With its Bluetooth connectivity, it provides wireless freedom, allowing you to enjoy your favorite music or take calls without the hassle of tangled wires. The USB connector ensures easy charging and above offers flexibility in use. Compatible with a universal operating system, this headset is perfect for users seeking high-quality audio and portability. Product Specifications: Battery: Built-in rechargeable lithium battery DC: 3.7V/400mAh Charging Power: Through computer USB or DC5V port Charging Time: Minimum of 4 hours continuously before first usage Description: Ensure uninterrupted usage of your device with the built-in rechargeable lithium battery. With a DC voltage of 3.7V and a capacity of 400mAh, this battery provides reliable power for extended periods. You can conveniently charge the battery through a computer USB port or a DC5V port for added flexibility. Before using the device for the first time, it is recommended to charge the battery continuously for a minimum of 4 hours to ensure optimal performance. Enjoy hassle-free power management with this efficient and versatile battery solution.