Uterine contraction pressure measuring range:0~100Pressure unit pregnant women blood oxygen saturation measurement, measuring range:70%~99% measurement accuracy:Error is±3% pregnant women pulse rate measurement measuring range:300bpm~240bpm measurement accuracy:Measurement error±2bpm NIBP measuremen measuring range a)Systolic pressure:6.7~32.0kPa(50~240mmHg) b)means pressure:3.4~26.6kPa(50~200mmHg) c)Diastolic pressure:2.0~24.0kPa(15~180mmHg) measurement accuracy:±1.1kPa(±8mmHg) or reading ±5%, whichever is the greater absolute value. pulse rate measurement range:40bpm~240bpm. pulse rate measurement accuracy:±2 or reading± 5, whichever is the greater absolute value. Measuring mode: manual start / stop NIBP measurement. Display LED display fetal heart rate curve, uterine contraction pressure curve, fetal movement markers, doctor event marker, time, volume and other monitoring status, and freezing and playback available. Power: a.c.100-240V,50/60Hz or 8.4V lithium battery Power dissipation: less than 20W Size: 295(L) X240(W) X73(H)mm Net Weight:1.75kg Environment working environment:temperature,+5℃~+40℃ humidity:<85% atmospheric pressure:86kPa~106kPa transport and storage environments:temperature,-10℃~+55℃ humidity:<93% atmospheric pressure:86kPa~106kPa probe acoustic output: In accordance with the provisions of international conventions IEC1157in 1992, the negative peak of sound pressure shall be no more than 1MPa, and the beam intensity shall be no more than 20mW/cm2. Spatial peak transient average soundintensity density shall be no more than 100mW/cm2 and sound intensity of the model shall be no more than 5.mW/cm2. Couplant: adhesive water-based compound, without stimulation and allergies to skin. Chemical stability, inhibit bacterial type.