YIHUA 908D soldering iron auto sleep/shutdown?

[seanspotatobusiness]

I was hoping someone with the YIHUA 908D soldering iron might tell me does the iron have separate sleep and shutoff functions (i.e. after 10 minutes the temperature drops to 200 °C or whatever and after 20 minutes it switches off completely) or is it just one of those? If it's just one of those functions then which is it? Thanks!