ALFA Kit: similar to Beta kit, but with reverve indicator only. (CA2K) 

BETA Kit: It has a change-over switch (CB2K) with CNG level indicator, safety-car and carburettor filling function during CNG to gasoline passage, infrared pressure gauge (MI2K) electrical wiring and assembly accessories. These kit if for use in carburettor vehicles only. 

GAMMA Kit: It has a change-over switch (CG2K) with CNG level indicator, safety-car, gasoline starting device and automatic change to CNG (after it reaches a pre-established RPM value, which is fully software programmable for different ignition configurations), infrared pressure gauge, electrical wiring and assembly accessories. These kit if for use in electronic injection vehicles only