Powered by USB and works great, a little scuffed on the end plate corners and a light scratch on the back (see photos). It has 4 rubber/gel feet on the bottom. I'd be happy to include the pictured J2J interconnect if the buyer wants (it's about 10cm long)

Buyer to pay international shipping, but I will include it for a UK buyer

https://www.head-fi.org/classifieds/member-feedback/tetromino.58519
I have an older feedback thread too but I don't think it works
eBay feedback: https://www.ebay.co.uk/fdbk/feedback_profile/lucere910