Features -Input AC:100 ~ 240V at 50/60Hz Output DC: 12V/700MA -3 measuring modes: Absorbance, concentration, and method of cutting to determine positive and negative values -Filters are easily interchangeable for different length of wave. -Readings with volume of reagents of 0.3 ml in the wells and 0.5 ml in the cuvettes. -Optical drive rotating patented (US Patent No 5,221,961). I was able to rotate vertically and horizontally to accommodate the buckets and all kinds of experiments. -LCD display and two buttons to read and control the equipment. Easy operation and minimal training. Perfect for beginners. -Unit is small and portable. You can connect to a 12V battery for operations in the field. -LCD display with 16x2 characters.