I've just spent 33,000 Lufthansa Air miles (£99) on this.
Its a pretty sophisticated device that tracks your movement, sleep etc.. and then communicates it all to an app on your iPhone or Android smartphone. Within the App you can also track your meals (as easy as scanning the barcode) and then it will give you a full summary of your activity, calorie intake etc.. I was initially quite sceptical, but after a full day and night use I'm really getting into this shit.
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