Instructions Sonoline B Pocket Fetal Doppler is a hand-held obstetrical unit, which can be used in hospital, clinic and home for daily self-check by pregnant woman. Fetal doppler Contains components of ultrasonic signal transmitter and receiver, analog signals processing unit, FHR calculating unit, LCD display control unit etc. Sonoline B Pocket Fetal Doppler is a high performance model with (fetal heart rate) LCD digital display. It has 3 work modes: Real-time FHR display Mode, averaged FHR display mode, and manual mode. It has audio output and can be connected with earphone or recorder with audio input. Main Features -Battery status indicator -Low power inspection of the battery -Built-in speaker -Output for headphones -The probe can be changeable -Probe inspection -Backlight -Auto shut off -Support 2MHz, 3MHz, 4MHz, 5MHz, 8MHz probes -Two pieces of standard 1.5V alkaline battery available which can work no less than 10 hours Main performance. Anti-electroshock Type: Internally powered equipment 2.Anti-electroshock Degree: Type B applied part 3.LCD Display: 45 mm × 25 mm 4.FHR Measuring Range: 50 BPM ~ 240 BPM (BPM: Beat per minute) 5.Resolution: 1 BPM 6.Accuracy: ± 2 BPM 7.Power Consumption: < 0.8 W 8.Voltage: DC 3.0 V 9.Power Supply: TWO 1.5V(AA size)alkaline battery 10.Suitable Using Range: Suitable for use after the 12th week of pregnancy 11.Auto Shut-OFF: After 1 minute no signal, power off automatically Pocket Fetal doppler Probe: 1.Nominal Frequency: 2.0 MHz 2.Working Frequency: 2.0 MHz ± 10% 3.Ultrasound Output Power: P < 10 mW 4.Ultrasonic Output Intensity: Isata < 5 mW/cm2 5.Negative Peak Sound Pressure: P_ < 0.5 MPa 6.Working Mode: Continuous wave doppler Effective Radiating Area of Transducer: 208 mm2 ± 15% Physical Characteristic Dimension: (L) 135 mm × (W) 95mm × (H ) 35 mm Qualification Sonoline B:Pocket Fetal Doppler-CE/FDA