The brand is Tzumi

The AquaBoost boasts a rugged, IP68 Certified Waterproof shell made entirely from shock-proof silicone. The speaker works with Bluetooth V4.2 technology and will stream from any paired device for a range up to 33 feet.
Unlike many other speakers that are only water-resistant, the AquaBoost is fully waterproof: when this speaker gets dunked in the pool, it just floats and keeps playing. It’s perfect for the rain, the shower, the beach, or anywhere you might get wet.
Imcludes auxiliary and Micro-USB cables for hardwired connections and charging your speaker easily. By powering with a wall port or computer connection for just three (3) hours, you’ll get up to five (5) hours of clear, quality playing and talking time.