Calus Extreme Boom+3 portable Bluetooth speaker.
It features Bluetooth 5.3 connectivity, AUX, TF/USB playback, and an EQ button.
The speaker is rated IPX6 waterproof.
It offers approximately 6.5 hours of playtime at 50% volume (with RGB lights off).
The speaker has a "superbass" sound feature and supports Dolby and Hi-Res audio.