Logitech Z623: This is a 2.0 channel multimedia speaker with high-quality audio processing chips, providing clear and engaging sound performance. It also supports USB and Bluetooth connection methods, making it easy to connect to various devices.

Jabra Speak 750: This is a portable speaker with clear sound quality and noise reduction capabilities, supporting USB and Bluetooth connections, making it perfect for calls and music playback.

The above are several portable USB 2.0 stereo speakers that use high-quality audio processing technology, excellent sound performance, and convenient connection methods, making them suitable for use with devices such as computers and mobile phones. You can choose the appropriate one based on your own needs and budget.