Very cool Helium Mono speaker. Charges to full in about two minutes and will play for 8+ hours. Sound is very clear with an audiophile 4" Fostex FE 126 driver and APT-X. Bamboo enclosure and bass port. Excellent sound. Supercapacitors have an infinite battery lifespan (as opposed to lithium batteries that degrade in capacity after a couple years). Made in USA.