Used in motion studies in classrooms, physics and Q.C. labs. Convenient for non-contact measurement of running machinery in factories and elsewhere since, unlike tachometers, stroboscopes require no special reflective tapes. Powerful xenon lamp. The ½” high 4 digit LED is easy to read in both light and dark environments. Microprocessor circuit with a crystal time base insures high accuracy over a wide range and does not require recalibration. Built in tripod screw. Works on 110V only. Dimensions: 9” x 5” x 5” (235 x 125 x 125 mm). Weight: 32 oz (900 g)