A High Speed HDMI Cable from Monoprice is the only way to ensure that you have the ability to pass ALL signals authorized in the latest HDMI feature specification. The CL2 rating on this cable indicates that its outer jacket has been designed to burn more slowly thereby making it safe for use inside or through the walls of residential classed buildings. The CL2 rating ensures that your cable installation complies with fire safety codes and insurance requirements. TIP:.