Poweam Medical Systems Co.,ltd Features:Small unit only 0.3KG, easy to be carried and used. Various working mode including FHR mode, curve mode, replay mode, manual count mode, average FHR mode, count-down FHR mode to guaranty the accurate FHR detection. FHR curve display and half hour curve replay function Detect and indicate probe-off No signal after 30 seconds, enter to power saving mode automatically. After 2mins, auto shut off. Li battery can work continuously for 300 mins Display color OLED display FHR value, FHR intensity, speaker volume, battery capacity indicator, working mode, frequency of probe and FHR synchronization symbol.FHRFrequency: 2.0MHZ Intensity: 5mW/cm or less Range: 60-210bpm Range for manual count mode:30-250bpm Accuracy:±1bpm

FD-20D