It is a 7.4v MSR ICU-L I got from Pe Reviers in the Netherlands. Saved about $100. Horizon replaced the defective ignition for free, so now I have a spare for my Evolution and MVVS engines, it works on all single piston engines. My son and I fly at Stone Mountain(SMRCF). A bunch of our members moved to GMA. I would like to drive up there one weekend, the photos look nice. I have a 45cc evolution that is almost four years old and seems to run better everytime it is flown.