Here's the Datamask H.U.D., a personal dive computer that takes the self-contained part of SCUBA diving to the next level by placing all the information about your dive right there in front of you in a head-up display. Originally developed for the military and now available for use by the rest of us, this is one sophisticated mask.

Its Digital Optic system displays your current depth, elapsed dive time, the amount of pressure in that air cylinder on your back, and time remaining. It keeps all that information easily visible even in the murkiest conditions, and helpfully remembers the info from your past 24 dives, too. If you're serious about your diving gear, it might be worth its $1495.95 purchase price. — Charlie White

Oceanic, via The Uber Review