1. UltrasoundPulsed doppler Frequency: 2.0 Mhz Intensity: <10mw/cm2 FHR Range: 50 ~ 240 bpm FHR Accuracy: 0.5% Dual Doppler 2. FECG(Optional Sensor)FHR Range : 50 ~ 240 bpm Input Impedance : >10 Mohm Leakage Current : <0.04 uA/V at 50/60 Hz 3. FM(Fetal Movement)Detection Method Ultrasound Dual FM 4. UCExternal Type Frequency Response : DC to 0.5 Hz Reference/Zero Control Measurement Range : 0~99 units 5. DisplayHeart Rhythm Display Signal Quality Display Alarm ON/OFF Display Printing State Display Operation Channel Display Battery State Display 6. SoundDoppler Sound with Volume Control ECG Beep Sound with Volume Control Information Sound 7. PrinterThermal Array Type Record Speed : 1, 2, 3cm/min Record Contrast : mode 1,2,3,4 Auto Record Period : 0, 10, 20, 30, 40, 50, 60 min Paper Feeding Zoom in particular response. 8. Signal interfaceDigital I/O : Ethernet Central Interface 9. PowerAC Input : AC 88V ~ 264V/45Hz ~ 66Hz, free Voltage Battery Operation : +12V *Above specification subject to change without a notice