Tachometer Combines Contact and Noncontact Tools for All Applications
Includes wheels for linear surface speed or rpm measurements, four 1.5V AA batteries, 23" reflective tape and carrying case. Characters on display reverse direction depending on contact or photo mode. Memory / readings button holds last reading for 5 mins. and recalls min. / max. readings. EXTECH Combination Contact / Photo Tachometer uses visible light to read up to 6" from target.