Using this Optrel Crystal 2.0 welding helmet is simple. First, if you have an E3000X PAPR system, connect the hose to the proper connection on the crown of the helmet. Put on the helmet like you would a regular one and start your welding work. When it comes to safety, always make sure the connection is secure before starting. This helmet is designed for E3000X PAPR users, so don't try to use it with other systems unless it's compatible. For maintenance, clean the lens regularly with a soft cloth to keep your view clear. Don't use harsh chemicals as they might damage the lens. Store the helmet in a dry place when not in use to prevent any damage.