Lux meter AR813A has ±4%rdg ±10 digits / ±5%rdg ±10 digits accuracy, 1~100.000 lux measuring range, lux unit selection, 3 manual modes selection, data hold function, battery indication, repeatability ±2%, operation condition 0 °C ~ 40°C, sampling rate 2 time / sec, resolution 1 lux, 9V power battery, weight 116g and size 165 x 64 x 28 mm.