how do I use recovery mode

I just want to know if my psp ever bricks how do i doit and how does it work wat program do i use do i need to buy something thanks alot!!!!!!!!!!!!!:D

Hold the power button until it turns off. Then hold R and turn it on again. :)

You have a 2.70 only custom firmwares have it 1.5 and 2.71 se-c

i have a 2.8 and when i do it nothing happens

Because you need custom firmware