Blue Muzen Wild Go speaker, I use in the medical field to listen softly to music in an office setting, and louder while in a hospital/surgical setting. Fits in my scrubs shirt pocket. The music is crisp and clear whether loud or soft. Battery recharges very quickly with USB-C. Battery life depends on volume, about 6 hrs while 70% volume, 8+ hrs if at lower volume. Colleagues like the unique look of the speaker and ask where I bought it.