The stick does not have any temperature sensor.
A great way to figure out what current your hub will run would be to measure the input voltage, if it starts to sag that means you're burning power inside the hub.
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novak
I see, i think with my technical skill, i will use a laser thermometer on the back of the pcb. (For the temp)
However i did finally got a decent multimeter so it would probably good to learn a bit that way. By sag you mean i should figure out how to check the voltage of the usb port under load and if its not at the voltage it should be, i've found the hub's limit?