To switch between PWM and Analog, press the Rocket and Power buttons at the same time.PWM (best for light whipping) = Analog (best for light painting) = The RGB Critter includes our innovative technology that allows the Critter to drive the LED using either Pulse Width Modulation (PWM) or Analog technologies. All other RGB LED flashlights drive their LED(s) using PWM, which creates unsaturated colors and an undesirable "strobing" effect that can clearly be seen in light paintings (long exposure photography).The main benefit to using the PWM option are the beautiful "tracers" (small flashes of different colors) that can be seen in our BitWhip Fiber Optic Whip and Fyber Kit products, both of which are both made up of end-glow fiber optics.The RGB Critter's Analog option provides a direct electrical current to the LED, which results in the most pure and rich colors possible. If you are a light painter, there is no doubt that you need the option to drive the LED using an Analog signal so that you can create the most vibrant photos possible.