Cambridge Audio is a British manufacturer of high end audio equipment. It is founded in 1968 by a group of young technology graduates in Cambridge, England. And hence the name, Cambridge Audio. Though back then, it is known as Cambridge Consultants.
Yoyo is Cambridge Audio entry into the Bluetooth speakers market.
I did a search on HardwareZone Forums and saw some posts saying they got it from iStudio. I went to a few iStudio shops around town and could not find it. If I happened to find it, I will update this post again with the location of the shop and the price.