djprMode button
From OFF: press to do a battery check (blue LED blinks 1-3 times).
From ON or OFF: Press and hold for 1/2 second to momentarily enter Turbo as long as button held.
From ON: Press to cycle Low/Medium/High
Power button
From OFF: press and hold for several seconds to turn ON to last mode
From ON: press to turn off
Press both buttons together to toggle "automatically turn off after 30 seconds" feature.