A pool amount of a jackpot award is adjusted without deteriorating individual game attractiveness of all game apparatuses even in a game system in which game apparatuses of different models are mixed. In some embodiments, an access point for the wireless network transmits a group acknowledgment to indicate whether communications from the plurality of wireless devices have been received or correctly decoded within some time interval. A pulse number is calculated based on the temperature of transmission fluid. The trigger cannot be pulled when it is in the safe position, and when the action is in the safe position, the hammer cannot contact the firing pin. This allows to limit mechanical stress in the optical fiber device within the package. The preferred embodiment of this invention is one in which the nail body optionally includes a flat bottom section which includes one or more detachable ringed or recessed sections, said ring sections or recessed sections capable of holding rounded and optionally recessed files andor pumice stones andemery files andor foot scarpers useful in grooming feet.