Note that HDMI Cables with RedMere are directional. One end must be connected to the source device (e.g. blu-ray player) and the other end to the sink/display (e.g. HDTV). Hooking them up backwards will not damage anything they just won't transmit a signal. Also note that these cables are fully compatible with switches splitters matrix devices etc. They can be used in any application in which a normal HDMI cable can be used and many applications where HDMI extenders would otherwise be required!
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: It is a good idea to test cables and connections before installing them inside a wall. If there are any issues or problems we can help you resolve them before you spend the time effort and expense of installing them inside the walls.