The MM-FD002 is a handheld Doppler can meet routine examination requirement of obstetricians, midwives, and pregnant women. It is a high performance model with FHR in TFT Color LCD display: Fetal heart rates, bar graph, and heart beat waveform color screen display. It has three heart rate processing modes: real-time FHR display mode averaged FHR display mode and manual mode. Both of the models have audio output, and can connect with earphone or recorder with audio input. MM-FD002 has a slim, power saving and interchangeable ultrasound probe.Features :Beautiful shape, portable, easy to operateThe probe has bending structure which is easy to operate.Fetal heart rate value , bar graph and heart beat waveform color screen displayAlarming in red when the fetal heart rate range is out of the normal range Real-time FHR display mode, averaged FH display mode, and manual modeBattery status indicator Built-in speakerCan connect with earphone or recorder with audio input2 pieces of standard 1.5V alkaline battery available which can work no less than 8 hoursWorking System: Continuous running equipmentSuitable Using Range: Suitable for use after the 12th week of pregnancyProbe: Prevent from water splashing, degree of protection: IPX4Safety featuresPhysical Characteristic :Size: 135mm (Length) 92mm (Width) 29 (Height) mmWeight: About 245g (including batteries)FHR Performance :FHR Measuring Range: 50240BPM (BPM: beat per minute)Resolution: 1BPMAccuracy: 2BPMPower consumption: