SG Timer GO only has two buttons: Start (the big one) and Function (the small one).
To turn on the timer, press and hold the Start button.
To turn off the timer, press and hold both buttons simultaneously. The timer will also turn off automatically after 30 minutes of inactivity.
Hold the “Function” button to switch between modes: “Shooting Drills”, “Dry Fire Drills”, “Free Shooting” and “RO Mode”.

After selecting the mode, press the Function button to switch between presets in Free Shooting or between Drills if you’re in Dry Fire Drills or Shooting Drills Menu.
Presets in Free Shooting and shooting settings in RO mode can be changed in the timer or Drills app.
To enter the editing menu, double press the Function button.
Press Function button to scroll through available parameters.
Press Start button to edit the parameter and then use Start and Function buttons to adjust it.
Long press Function button to apply.
Long press Function button to return to main training screen.Shooting and Dry fire Drills can be created and edited only in the Drills app.
Learn more about Drills app here.