mo,s scoobymonster

could you please tell me how to set the turbo timer on my 95 jdm wrx ive got the time set to 2 monutes after i shut the engine off so the timer keeps running.what i would like to know is that how do you set the rev limiter settings ie when you get to 6000 revs that the timer starts bleeping etc. please could some1 tell me how to do this because i have just got the car imported and i have no instructions for the timer.
the timer is a blitz timer where the screen is blue hope this help.
thanks in advance for all your replies