Modern car keys are big, bulky and just a bit of a nuisance. They create unsightly bulges in pockets and if you're dressed head to toe in sports gear there's rarely a place to put them. Until now.
Jaguar's Activity Key may not be a solution for the masses, but for those who lead active lifestyles - keen cyclists, runner, surfers etc - it's certainly a handy advancement.
If you can afford to treat yourself to a brand new Jaguare F-Pace (we're talking upwards of £34,000 here) then you may want to splash out on this waterpoof optional extra which is part of the £878 (around US$1,200, AU$1,600) sporting pack.
Riding the wave of technology
Slap the activity key on your wrist and when you arrive at your destination leave your traditional fob in the car and head to the rear of the F-Pace. Then just tap the wearable on the J of the Jaguar logo on the vehicle and it'll lock the car and disable the key fob inside.
That's useful, because it prevents anyone who potentially breaks into your car while you're out being healthy, from starting the engine and driving off. Phew!
For now the Activity Key is only available with the F-Pace, but we expect Jaguar to roll out the functionality to more of it models, including its sister brand Land Rover, in the future. It also paves the way for the technology to appear in more affordable vehicles in the next few years.
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John joined TechRadar over a decade ago as Staff Writer for Phones, and over the years has built up a vast knowledge of the tech industry. He's interviewed CEOs from some of the world's biggest tech firms, visited their HQs and has appeared on live TV and radio, including Sky News, BBC News, BBC World News, Al Jazeera, LBC and BBC Radio 4. Originally specializing in phones, tablets and wearables, John is now TechRadar's resident automotive expert, reviewing the latest and greatest EVs and PHEVs on the market. John also looks after the day-to-day running of the site.