This is a projector user manual that introduces the basic operation of the projector, including safety precautions, operating precautions, light source unit precautions, laser precautions, other precautions, post-use handling, projector storage, projector cleaning, unpacking, general guide, preparation, loading remote controller batteries, projector setup, setup precautions, changing the projector elevation angle, connecting the projector to the computer, starting and stopping projection, starting the projection, turning off the projector