This flexible Clamp meter is a portable handheld professional detector that measures AC current and frequency. Suitable for electrical equipment testing and maintenance. Featur es : Flexible clam p , convenient to use. It can identify the measured signals and display the result automatically. LCD display with backlight and flashlight, easy to operate and read. Data hold fu nction , low battery indication, auto power off. Perfect for electrical de vices testing and maintaining. Technica l Ind ex Rang e Accu racy PM2019A (Optional) PM201 9S ( Optio na l ) AC Current 30A/300A/3000A (3.0%+5) (3.0%+5) DC Voltage 6V/60V/600V (1.0%+3) AC Voltage 6V/60V/600V (1.2%+3) Resistance 6k/60k/600k/6M (1.0%+3) Frequency 40Hz-1kHz (1.0%+2) 20Hz-1kHz (1.0%+2) Specification Optional Model PM2019A PM2019S PEAKMETER Display 6000 counts 6000 counts Data Hold Yes Yes Lighting Yes Yes Blacklight Yes Yes True RMS NO Yes Battery 3pcs x 1.5 V AAA Battery ( NOT included ) Clamp Diameter 75mm/3inch Size (Approx.) 16.5*11.3*2.5cm/6.5*4.4*1inch (as picture ) Weight (Approx.) 340g/12oz 422g/14.9oz Op tional Model Pac kage List PM2019A 1 x Flexible Clamp Meter 1 x User Manual PM2019S 1 x Flexible Clamp Meter 1 x User Manual 2 x Test Probe Note: Only things package included, no other stuff.