PERCY'S DIGITAL EXHAUST TEMPERATURE INDICATOR IS AN INVALUABLE TOOL FOR PRECISE ENGINE TUNING. OUR INDICATOR HAS FEATURES OTHERS DON'T SUCH AS AN EXPOSED JUNCTION THERMOCOUPLE FOR INSTANT RESPONSE, A HOLD BUTTON FOR RECORDING MEASUREMENTS AND A MAX BUTTON WHICHS RECORDS THE MAXIMUM TEMPERATURE REACHED DURING A TUNING SESSION. PERCY'S INDICATOR ALSO HAS THE ABILITY TO MONITOR TWO CYLINDERS AT ONCE ALLOWING OBSERVATION OF FRONT/BACK OR LEFT/RIGHT BANKS OF THE ENGINE. IT ALSO SUPPLIES A DIFFERENTIAL READING, ALLOWING YOU TO MATCH SEPARATE CYLINDERS PERFECTLY. KITS ARE ALSO AVAILABLE TO WITHSTAND THE HARSH RF SIGNAL COMMONLY ASSOCIATED WITH MAGNETO IGNITION SYSTEMS!