The Genisys Performance Gas Module KitFeatures and Benefits: Easily snaps onto the Genisys, providing another level of diagnostic capability Powered by the Genisys on-board battery; no need for extra connections to the vehicle Gas analyzer can run simultaneously with other Genisys software applications Meets or exceeds the following accuracy standards; BAR 97, OIML Class 0. Genisys Gas M-P software offers complete 5-gas functionality with hot links directly into vehicle diagnostics Automatic water purge eliminates the need to disassemble the water trap or manually drain water. NOTE: Genisys Unit Not Included