InstructionsPocket Fetal Doppler is a hand-held obstetrical unit， which can be used in hospital， clinic and home for daily self-check by pregnant woman.The device uses color LCD of high resolution to display the fetal heartbeat waveform， and figure out the FHR to help the doctor diagnose in time.It contains components of ultrasonic signal transmitter and receiver， analog signals processing unit， FHR calculating unit， LCD display control unit etc. It has 3 work modes: real-time FHR display mode， averaged FHR display mode， and manual mode .It also has audio output， and can be connected with earphone or recorder with audio input.Main Features??Beautiful shape， portable， easy operation??The probe has bending structure which is easy to operate and can increase the ease of the pregnant women， embodies the humane care design??Fetal heart rate values， bar graph and heartbeat waveform color screen display??Alarming in red when the fetal heart rate range is out of the normal range??Battery status indicator??The probe can be changeable??Probe inspection??Built-in speaker??Output for headphone??Auto shut off??Two pieces of standard 1.5V alkaline battery available which can work no less than 8 hoursMain performanceAnti-electroshock Type: Internally powered equipmentAnti-electroshock Degree: Type B applied partDisplay: 1.77"262K TFT displayFHR Measuring Range: 50 ~ 240 BPM (BPM: beat per minute)Resolution: 1 BPMAccuracy: ??2 BPMPower Consumption: < 0.8 WVoltage: DC 3.0 VPower Supply: TWO 1.5V??AA size??alkaline batterySuitable Using Range: Suitable for use after the 12th week of pregnancyAuto Shut-OFF: After 1 minute no signal， power off automaticallyProbe:Nominal Frequency: 2.0 MHzWorking Frequency: 2.0MHz ?? 10%Ultrasound Output Power: P < 10 mWUltrasonic Output Intensity: Isata < 5 mW/cm2Negative Peak Sound Pressure : P_ < 0.5 MPaWorking Mode: Continuous wave dopplerEffective Radiating Area of Transducer: 157 mm2??15%Physical CharacteristicDimension: (L) 135 mm ?? (W) 92 mm ?? (H ) 29 mmWeight: About 245g (including batteries)QualificationPassed CE