Typically Sony’s entry-level mini Bluetooth speakers have started at $50. But the SRS-XB01 lists for $35 (£30, AU$50) and sometimes gets discounted to $25. That’s pretty inexpensive.

While it’s lightweight at 5.4 ounces (154 grams), it manages to avoid feeling cheap. The speaker feels solid enough, with a textured finish and a set of rubberized buttons on top that allow you to play and pause your music, or answer and end calls, and adjust volume. A gasket hides the USB charging port and audio input.
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https://www.cnet.com/reviews/sony-srs-xb01-review/