I have tried to find this info but no luck. Did I miss it? All I find is volts but no temperature to go with it. Yocan Uni new user.

You can click the fire button 3 time to change the voltage option.
Low: 3.4V, 1 light on
Middle: 3.8V, 2 lights on
High: 4.2V, 3 lights on

Yes but what temperature does that produce?

I think the exactly temperature is depend on your cartridge resistance and the Mod voltage output.
So, if the temperature too high, you can switch low voltage option.
Hope this tip can help you.
Any further questions, please let me know.