Cool blue calculation meets red-hot performance! This C2 tachometer is just what you need for unbeatable performance and good looks. Blue shift light uses LED powered luminescent technology and tach features precision air-core movement engineered to provide extremely accurate readings under harsh conditions. Air core eliminates drive against bi-metal by utilizing magnetic fields for resistance free and exact operation. 10,000rpm tach operates on 4, 6 and 8 cylinder engines with standard, electronic and most high performance racing ignitions with 12-volt power.