Disclosed in the present invention is a method for a relay to execute a random access procedure in a wireless communication system. The armor arrangement includes two inert reactive armor modules arranged one behind the other, which each include a plate made of inert material, interposed between steel plates. The shims are laser-welded at a welding portion to cover the beads. The device is compressible for percutaneous delivery to the valve. The method is particularly useful in key input devices sensitive to non-activating finger position above the keys.