It's expensive, but the Activity Key from Jaguar comes with possibly the best accessory so far: a 3-litre supercharged SUV that does 0-60mph in under 5 seconds. Say hello to the F-Pace.<br /><br />What wearable tech do you use? Let us know in the comments section below.<br /><br />SUBSCRIBE: http://smarturl.it/StuffTV<br /><br />For the best gadget news and reviews visit http://www.stuff.tv <br /><br />Follow Stuff on Twitter: http://goo.gl/TQTgyB<br />Like Stuff on Facebook: http://goo.gl/c4W6uh<br />+1 Stuff on Google+: http://goo.gl/GxEczq<br /><br />For more reviews, unboxing videos and product comparison subscribe to What Hi-Fi? TV http://smarturl.it/WhatHiFiSub
