A liquid ejection device with a plurality of liquid ejection heads each having a liquid ejection surface that is elongated in a main scanning direction and is formed with a plurality of liquid ejection ports. The invention provides for automatically obtaining authorization information in addition to marketing, advertising, andor promotional information prior to expiration of each authorization interval or period. Next, the storage unit responds to an input of a request for flashing transmitted from the program to store, in the disk device, the data stored in the cache memory. The set of available multicast IP addresses may also be selectively varied according to a secret predetermined scheme known to the transmitter and subscriber end stations, particularly by adding to and dropping from the set of multicast IP addresses in a seemingly random fashion. An electronic control circuit is arranged for providing voltage differences the electrodes in dependence of a position of the first and second electrode along the perimeter of the through opening. A linkage is coupled to the post and to the second clamp fitting.