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Projectors come in three colors (red, green, blue).
Power Source: USB Port or Cigarette Lighter.
NOTE: Make sure you have a visible USB or cigarette lighter port or else the projector will not be able to project onto the ceiling if it is obstructed.
Twist the top of the projector to adjust the pattern, and use the bendable stem to adjust the direction of the projection
Disclaimer: Depending on the location of power source, projector may shine in the eyes of the driver. Be aware of the power source location, and it is advised to point it away from the driver.