A mounting device for a fan includes a base board and a frame mounted on the base board. The logic circuit includes a depletion transistor 101 and an enhancement transistor 102. The user of the wireless device selects which mode the device is to use when placing a call to a called party by inputing codes or characters into a dialing string. The porous structure is disposed between the top end and the bottom end. A lock is attached to the box that prevents the box from being opened until the lock is removed with a key or until the lock is destroyed. The case includes a receiving cavity for receiving the memory module, and a first inner case with a first rack engaging with one side of the gear.