Insert HDMI and USB 3.0 Type ACouplingMatte blackNotes: Only for screw fastening. Warning! Pay attention to the installation space for plugs and bending radii. When using couplings, note: Not suitable for duct installation and standard device sockets. Connection with angle plugs recommended. When using these plugs, there is a power limit of 15 watts for connected devices. Installation recommendation: Kaiser electronic sockets Flush-mounted installation: Kaiser Order No.: 1068-02 Hollow wall installation: Kaiser Order No.: 9062-94 Concrete installation: Kaiser Order No.: 1268-40