The Coil and Control Module Tester, No. 4400, from Innova Electronics Corporation is designed for in-store use to easily and safely test the ignition circuitry of ignition coils and DIS/EIM control modules to determine if the part is good or bad. The 4400 is user-friendly and saves time and money at the point-of-sale by helping counter personnel quickly evaluate modules and sell the right part the first time. They can also test coils and control modules at the counter to determine if the product is defective and a return is warranted.