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Sonoline B Fetal Doppler 

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.It 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
Anti-electroshock Degree:Type B applied part
LCD Display: 45 mm × 25 mm
FHR Measuring Range: 50 BPM --240 BPM (BPM: beat per minute)
Resolution: 1 BPM
Accuracy: +/-2 BPM
Power Consumption: < 0.8 W
Voltage: DC 3.0 V
Power Supply:TWO 1.5V(AA size)alkaline battery
Suitable Using Range: Suitable for use after the 12th week of pregnancy
Auto Shut-OFF: After 1 minute no signal, power off automatically
Probe:
Nominal Frequency: 2.0 MHz
Working Frequency: 2.0 MHz ± 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: 208 mm2 ± 15%

Physical Characteristic
Dimension: (L) 135 mm × (W) 95mm × (H ) 35 mm

Weight: About 180 g (including batteries)
Qualification
Passed FDA and CE