A wireless transmission system is provided that can minimize the control command transmission amount by operating a plurality of sink devices in conjunction with each other with respect to each group when performing a wireless AV transmission. One implementation includes a router component and a configuration manager component. The light source holder can undergo limited movement relative to the socket along a plurality of axes, including a central axis of the socket. These effects are opposite to the prometastatic effects of tumor-secreted heparanase. Each of the integral extensions has a transverse score line which divides the extension into an upper and a lower section.