Specification Brand : Crosstex BulletPoint1 : Can use either tap or distilled water BulletPoint2 : Once installed, no monitoring/shocking protocol is required BulletPoint3 : Cartridge reduces bacterial exposure by eluting non-allergenic, elemental iodine into dental water BulletPoint4 : Change every 365 days, or 240L of water BulletPoint5 : Crosstex reminds you when it is time to replace your cartridge Color : black-white ExternallyAssignedProductIdentifier1 : 745950057895 ExternallyAssignedProductIdentifier2 : 0745950057895 ExternallyAssignedProductIdentifier3 : 0046843608270 ExternallyAssignedProductIdentifier4 : 0220215082916 FdaDeviceClassification : iv FdaIndicationOfUse : otc FdaInstructionsForUseType : consumer FdaLabelType : consumer Hazmat : 3 IncludedComponents : Cartridge ItemName : Water Operator Study Tools ItemPackageDimensions_Height : 10 inches ItemPackageDimensions_Length : 10 inches ItemPackageDimensions_Width : 10 inches ItemPackageQuantity : 1 ItemTypeKeyword : professional-dental-water-treatment-and-equipment Manufacturer : American Water Works Association (AWWA) ModelNumber : DP40B NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : DP40B ProductDescription : Includes Math for Water Treatment Operators: Practice Problems to Prepare for Water Treatment Operator Certification Exams Math for Distribution System Operators Water Operator Certification Study Guide, Sixth Edition ProductExpirationType : Does Not Expire ProductSiteLaunchDate : 2015-12-31T08:00:01.000Z StreetDate : 2017-03-12T00:00:01Z SupplierDeclaredDgHzRegulation : unknown TemperatureRating : Ambient: 15 to 25 C (59 to 77 F) UnitCount : 1