The Bass Egg is a portable wireless audio device that turns the surface you place it on into a powerful, full-range speaker. One-of-a-kind, Kickstarter product that went to market briefly. Kickstarter: https://rekkerd.org/the-bass-egg-projectsmall-portable-sleek-wireless-and-easy-to-use-speaker/
Official website: https://bassegg.com/
A review: https://www.technologyx.com/digital/audio-2/speakers-peripherals/bass-egg-verb-bluetooth-speaker-not-average-speaker/ Condition: USED, LIKE NEW. Everything is in original packaging, including the instruction booklet.
(see pictures below)