Modern white LED through-the-dial lighting provides clear visibility during nighttime use. sending unit adapters (1/4" 3/8" and 1/2" NPT adapters). mounting hardware and detailed instructions for installation.. Autometers Race Proven Air-Core Electric Instruments Provide Quick And Accurate Readings While Keeping Hazardous Fluids Outside Of The Vehicle. 12 and 16 volt compatible compatible with nearly every street car or race car electrical system. Speedometer has a simple push button 2 mile drive calibration. No dip switches and can be reprogramed at any time to accommodate changes in gear ratio or wheel and tire combination.. Speedometer is compatible with most two wire sine wave and three wire hall effect vehicle speed sensors.. Speedometer features lit LCD odometer - capable of registering one-million miles with two resettable trip odometers. Kit includes fuel level sender (240E/33F). oil pressure sender water temperature sender 2-wire hall-effect speed sender that is compatible with GM/Chrysler applications (7/8" - 18THD)