AideTek ACM03 Auto Range AC DC current Clamp Meter Multimeter backlight clamp light Freq hold buzz duty compared w/FLUKE CE CAT.III600V Blue FeaturesMeasuring frequency, AC/DC current and duty cycle by clamp; LCD with backlight bar graph clamp lighting bulb; Relative value measurement and auto range function. 5. Data holding To hold the readings while taking measurement; Maximum and minimum value measuring and holding Automatic indication of functions and unit symbols; Auto power off and low battery indication; ver-molding rubber case, shake-proof, skid-proof and good touch-feeling, Full overload protection