DIGITAL STROBOSCOPE, rotary knob adj. Model : DT-2239A-2 (AC 220V or 230V) * Range : 100 - 10,000 RPM. * Accuracy : ( 0.05 % + 1 d ). * Xenon flash tube, Display : 10 mm red LED. * Size : 210 x 120 x 120 mm.