"CASE ABS PLASTIC; CIRCUITRY SOLIDSTATE; HEIGHT 4 INCHES; LENGTH 9.5 INCHES; WIDTH 5 INCHES; WEIGHT 2.5 LBS; BATTERY EVEREADY TYPE 522 9V; BATTERY LIFE 1000 TESTS; PORTABLE; DETECTS, MEASURES AND INDICATES THE TOTAL EFFECT OF CONTAMINATION ON THE DIELECTRIC CONSTANT OF OIL; USED TO DETERMINE WHEN OIL IS STILL USABLE; DETECTS EXCESSIVE OXIDATION BUILDUP OR FUEL DILUTION"