Operation ON/OFF Short press to turn ON, then short press again to turn OFF. 6 Kinds of LED light modes Mode (1): Green, yellow, red and blue four light color gradients. Mode (2): Short press once again, red. Mode (3): Short press once again, green. Mode (4): Short press once again, blue. Mode (5): Short press once again, yellow. Mode (6): Multi-segment flashing in four colors of green, yellow, red and blue. Short press in turn to cycle (1) to (6) modes. WARNING 1.