Indiegogo
Scam after fail after scam after fail.
It is instructive and amusing to look at lists of backers and if they are linked you can go there and click on Campaigns to see what other crap they have backed and how those campaigns are doing.
Pretty much everything technical (if it isn't a scam just badging some cheap chinese crap you can already buy on aliexpress) will be late or failed or not performing as claimed.