Small portable hemoglobin reader: fast measurement, data management and a long-lasting battery capacity Small size, light weight, low power consumption and fast measurement of the CompoLab TM make it one of the best hemoglobin measurement devices for human capillary whole blood. The CompoLab TM is really easy to use and requires almost no maintenance. Hb measurement result is available within two seconds with only one drop of blood. Major benefits of CompoLab TM are: Long-lasting battery capacity Data transfer via USB cable (optional Bluetooth, special software needed) Small size – large display No moving parts Reagent-free cuvettes with long expiration dating