Features . light weight, space-saving, easy to use . 8.4'' LCD screen, folding 60 degree . display waveforms and digitals simultaneously . FHR 120-160 mormal area highlight . 12 hours data and waveform storage and review . FHR upper and lower limit alarm . twins monitoring function option . high sensitive 9 elements 1MHz pulse doppler transducer . built in high resolution and long life printer . built in PC network can be connected to the central monitoring system