The present invention is related to the adjusting of a hearing device to the hearing preferences of a user of said hearing. The invention provides a gas generator for an air bag in which an amount of accommodated gas generating agent can be varied and the gas generating agent can be ignited and burnt unfailingly even by the ignition means having normal output. Each time a daily entry gets updated online, the label printer prints out a new sticky label whose size and markings correspond to the revised paper calendar entry for that day. Related plants for manufacturing vehicle-tire belt packages and crown structures are also disclosed. A main MOSFET is controlled by the first output signal to pull down Vout to match Vin when Vout is above a threshold voltage Vtrans.