Orders of 2 or more will receive a free gift.Built-in dual 3W high sensitivity driver and passive radiator. Note: This speaker does not have a volume control button, you can adjust the speaker volume on the device.$One cable is used for o and power. No need for 3.5mm AUX ja, a single USB cable can provide o and power for USB computer speakers. Greatly help you avoid messy cables. Note: There is no physical volume control knob on the speaker.$Compatible with Windows PC. The upgraded USB computer speakers are suitable for various brands of Windows (Vista/7/8/10) computers, such as , Lenovo, ASUS, , r, LG or more.$Compatible with some MacOS and Chrome OS laptops, as long as they have the latest o drivers installed for their sound cards. In addition, this USB speaker can even be used on some Xbox and PlayStation 4 devices.$Plug and play, very easy to use. Take a Windows computer as an example: insert it into the computer's USB port-cli the "speaker" icon in the taskbar-select "USB speaker" as your computer's playba device. Then, the USB speaker can work for you.