A cat scratching device for residing upon a substantially horizontal surface. Signals from customer premises equipment communicate to the local switch to select up to four simultaneous video streams. A silicon component in the silane coupling agent is contained in an amount of preferably 1 to 21% by mass, in terms of silica, in the active energy ray-curable composition. A through-hole extends from an outer periphery of the first end through the sliding groove. The mapping function fx authorises the communicative connection between the RFID tag 5 and the read-write device 1.