press it once and the lower light will turn yellow. Press it agian and it will turn red on full auto.
To change fire speeds press and hold it until it flashes. Then press it once to change the middle light red. Then press and hold it to make it stop blinking and vice versa to get it to fire slowly
To change fire speeds press and hold it until it flashes. Then press it once to change the middle light red. Then press and hold it to make it stop blinking and vice versa to get it to fire slowly