Key Features: CPR Microkey*, in black mini pouch with key chain. Positive one-way valve inside the airway enhancing bite block. Designed for maximum protection of the first responder. Assists in keeping an open airway. *CPR Microkey is a trademark of Medical Devices International.Recommended Industries/Use: AgricultureChemicalConstructionFire ProtectionFood ServicesForestryGovernmentLaw EnforcementManufacturingMedicalMilitaryMiningMunicipal ServicesOil and GasPharmaceuticalSteel and MetalsTransportationUtilitiesWeldingNuclearWind Energy