 with the sleep tracking, I'm pretty sure it's auto sleep. It might be sleep plus plus. I'll have to go back and look. You can set the alarm in the morning to wake you up when you're in your lightest, in your REM stage of sleep. When you're in stage one sleep. So yeah, so if you set your alarm for seven AM, you need to get up at seven. Somewhere between six and seven, the watch starts, well it doesn't start, I guess it's looking at you all night. It finds when you're in your lightest stage of sleep up to and before seven AM. So let's say at six forty two, you're in stage one REM sleep, the watch will start tapping you on the wrist. Whoa. So then you wake up from a lighter stage of sleep instead of that stage four groggy, what's my name, why am I here? Yeah, yeah. So. Fascinating. Yeah, wow. Okay, that's really cool.