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 audio and power. No need for 3.5mm AUX jack, a single USB cable can provide audio 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 HP, Lenovo, ASUS, Dell, Acer, LG or more.$ Compatible with some MacOS and Chrome OS laptops, as long as they have the latest audio 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-click the "speaker" icon in the taskbar-select "USB speaker" as your computer's playback device. Then, the USB speaker can work for you.