I agree with Vision, I don't look down at the temp when I am racing, if I hear the alarm(beep) go off I will pull off and save my motor and maybe the esc as well, the temp telemetry is very useful to me, running electric I like to get the maximum gear without burning anything up, great when testing for gearing, no need to run and hit it with my temp gun, and for the record, my onboard telemetry is never more than 2 degrees + or - of the gun.