Special features selectable power parameters of kw, Kvar & kva with total power factor in dual, Display kwhr recording autova auto selection on acv, Dcv or aca functions complete harmonic distortion thd%, F in dual, Display backlight display display hold peak, Rms hold pc, Comm computer interface capabilities optional general specifications sensing true rms sensing jaw opening & conductor diameter 45mm max display voltage function 6000 counts lcd display power, Ohm & hz functions 9999 counts lcd display aca clamp, On function 4000 counts lcd display update rate power function 2 per second nominal voltage, Aca clamp, On & ohm functions 2 per second nominal hz function 1 per second nominal polarity automatic low battery below approx 2. 4v operating temperature Temperature range: 0°C to 40 c relative humidity maximum relative humidity 80% for temperature upto 31 c decreasing linearly to 50% relative humidity at 40 c altitude operating below 2000m storage temperature Operating from 20 degrees Celsiuas high as 60 degrees Celsius < 80% relative humidity achieved with the battery taken out temperature coefficient nominal 0. 15x specified accuracy / c @ 0 c, 18 c or 28 c, 40 c, Or otherwise specified power supply standard 1. 5v aaa battery x 2. Power consumption voltage, Aca, Hz & power functions 11ma typical ohm function 5. 5 ma typical apo timing idle for 30 minutes apo consumption 4 a typical dimension 224 l x 78 w x 40 h mm weight approx. 224 gms