a multifunction manually oriented inflator to amplify the volume of gas provided for low - pressure inflation of multiple bladders . a default operation can be as a high pressure fixed - volume inflator . a shut off valve preserves excess gas supply while regulated flow allows optimizing volume versus rate of inflation and risk of aspiration . a detachable low - resistance check valve - coupler allows the valve to also serve as an oral inflate and rapid deflate valve for improving volume amplification . audible alarms distinguish functional inflation from gas wasting over - inflation . conserved gas can be used to inflate or pressurize additional survival devices or operate signal horns . a locking mount can align and secure a cylinder adjacent the piercing mechanism . spent cylinder threads can be degraded preventing reinstallation of a micro - pierced cylinder .