 then you could choose to buy one of these devices and then try and train yourself over time and use it to check whether things are getting better, whether you're getting more concentration for longer. And where do you think these are going to go in the future? I mean, these are quite new, aren't they? Yeah, I mean, so there's been various devices for the last five to ten years that are coming out, but it was really early devices. If you remember the oldest smartwatches and physical activity trackers we had, they were nice first new devices, but it took a long time to get to the kind of finesse of final devices by now.