A wordline voltage generation circuit generates an incremental step pulse voltage and includes a first circuit unit connected to a program voltage, a second circuit unit connected between the first circuit unit and a divided voltage and controlled by a program step code, and a third circuit unit connected between the divided voltage and a ground voltage. The follower has a blocking surface that blocks the muzzle during fastener-empty condition and prevents the muzzle from displacing into ready-to-fire position. A gaming communication link is used to exchange game play data between a gaming controller and one or more wireless devices. An earphone is telescopingly mounted on the second end of the C-shaped support. When a signal is compressed and expanded on a time base, the operation can be performed on the time base without frequency conversion.