Meet the Liddle Speaker: a tiny Bluetooth 5.0 speaker that attaches to the back of your smartphone to play your favorite music, podcast, and other audio content. It has a waterproof and dustproof design. You can pair two of these to experience stereo sound. The battery lasts up to 8 hours.
You can easily attach the Liddle to the MagSafe charging area on the back of your phone. It can also be attached to other surfaces. More info is available here.