♦14 hours battery (rechargeable), back-lit 4 lines display. ♦Data logger function. ♦Can be used for mobile measurement, flow rate calibration, data comparing, meters running status checking. ♦Non-invasive transducers. ♦Wide bi-directional flow range of 0.01 m/s to 12 m/s. Wide liquid temperature range: -35℃~200℃. ♦Works reliably in both clean and somewhat dirty liquids with turbidity<10000ppm. ♦Lightweight and easily transportable in box.