5.7 inch LCD screen,compact and light weight. Built-in high-capactity Li-ion battery , above 4 hours working time. Support data storage and software upgrading by external USB Disk. 112mm printer. Special extractable paper slot, easy for paper replacement and observation. Manual/automatic FM measurement , automatic fetal status scoring system. FHR signal strength indicator, twins cross channel verification. Power-off data protection for 300cases. 60 hours real-time waveform replay & storage. TemPom(™) timing monitor function, avoid overtime monitoring. Support timing printout. Support wire & wireless central monitoring station connection. Optional configuration: Twins.