Technical Features Display Content : bed No. pregnancyweeks, age, paper speed, date, time , volume, reminderstatus, transducer connection status. recorder status. FH R data & wave.Contraction data and wave, Fetal move times and mark etc Ultrasound probe Nominal Frequency : 1.0 MHz Work Frequency : 1.0 MHz±10% Negative peak sound pressure : p < 1 MPa Output beam intensity : |ob < 20 mW/cm2 The peaktime space peak intensity : lspta < 100 mW/cmz The average time space peak intensity : lsat < 10 mW/cm2 FHR Rang : 50 BPM~240 BPM Resolution : 1 BPM Accuracy : ±2 BPM TOCO TOCO range : 0~100% Resolution : 1% Nonlinearerror : <±1%0 RZ way : Manually Fetal Marking Forthe manual button [the operation of pregnantwomen],there will be a mark display in the bottom area of FHRwave display section. FHR Reminder: Reminderfor high and low FHR, which exceeds appointed limit.