The present invention concerns WLAN association device and process for associating a new station to a WLAN, via a central apparatus. The invention also includes systems for locating devices having a given state. The cover lens and the sensor device module are disposed in the touch display device in such a manner that a ratio of a standard deviation value of the finger’s touching capacitance of the cover lens to the sensor parasitic capacitance of the sensor device module is a signal-to-noise ratio. One or more settings associated with a smartcard are configured based on the level of access. A control unit controls ejection of ink from the print head of the first carriage based on an output from the first position detector, and ejection of ink from the print head of the second carriage based on the output from the second position detector.