TACHOMETER Features: Large 5 digit backlit LCD display Microprocessor based with quartz crystal oscillator to maintain high accuracy Store/recall 10 data sets in memory with 4 parameters (measurement, max, min and average) Wide RPM (photo and contact) and Linear Surface Speed/Length (contact) measurements Laser guided for greater distance non-contact measurements up to 1.6ft (500mm) Complete with contact wheel for rpm or linear surface speed/length, 9V battery, reflective tape and soft case Provides both contact (2 to 19,999 rpm) and non-contact (2 to 99,999 rpm) RPM measurements for enhanced versatility. Laser guided non-contact RPM measurements taken up to 1.6-foot (500mm) away for added safety. Readings are displayed on the large five-digit backlit LCD. Store/recall 10 data sets in memory with 4 parameters (measurement, max, min and average). Includes: Product Manual Contact Wheel for RPM or Linear Surface Speed/Length 9 V Battery Reflective Tape Soft Case