CES 2016: A look at the first tech announced in Vegas

It seems some people can't wait - the CES trade show doesn't officially start until Wednesday, when its giant exhibition floors open their doors.

But already tech firms great and small are firing out press releases and YouTube videos.

For smaller firms, announcing a product now represents an opportunity to beat the crush.

Start-ups that exhibited at CES's Eureka Park zone over the past four shows have collectively attracted more than $1bn (£680m) in investment since 2012, according to the event's organiser, so it's about more than just titillating the public.

But for the larger companies, revealing a product in advance might reflect the fact that it didn't quite make the cut to be spotlighted in one of the tightly-timed press conferences.

Either way, below are a few of the early announcements that caught our eye.