Dear Arqam, I visited the guy as per your location, showed the meter to him , the Main Ustad was not their, so the other guy asked me to come again in coming week as Ustad is not available at the moment, However he does recognise that they have installed this meter in past to some cars, He says in order to get the RPM's working they need to download a file into the meter, then it will work., but for that it might take upto 3 hrs. He also says that all extra lights will also be made off in meter. So i thought to share this detail with you.