The Hemocue White Blood Cell Analyzer can take capillary or venous (EDTA) whole blood samples. It is designed to establish agreement with manual light microscopy and is already factory calibrated (needs no further calibration). It also has a built-in "selftest" system that can be verified using liquid controls and has a correlation of 0.99 when compared with automatic cell counters. The analyzer has a measurement range of 0.3-30.0 x 109/L (300-30000/mm3, 300-30000/µL) and users will see the results in 3 minutes. It is powered by either an AC adapter or batteries and has a total weight of 600 g (1.32 lbs) with batteries installed.