Instructions<br /><br />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. <br /><br />Main Features<br />◆Built-in speaker<br />◆Three work modes: Real-time FHR display mode、averaged FHR displaymode and manual mode <br />◆LCD display<br />◆Probe inspection<br />◆Battery status indicator<br />◆Backlight<br />◆Auto Shut-OFF: After 1 minute no signal， power off automatically<br />◆Suitable Using Range: Suitable for use after the 12th week of pregnancy<br />◆Two pieces of standard 1.5V alkaline battery available which can work no less than 10 hours<br />◆Output for headphones<br />◆The probe can be changeable<br />Main performance<br /><br />◆Anti-electroshock Type: Internally powered equipment<br />◆Anti-electroshock Degree: Type B applied part<br />◆LCD Display: 45 mm × 25 mm<br />◆FHR Measuring Range: 50 BPM ~ 240 BPM (BPM: beat per minute)<br />◆Resolution: 1 BPM<br />◆Accuracy: ± 2 BPM<br />◆Power Consumption: < 0.8 W<br />◆Voltage: DC 3.0 V<br />◆Power Supply:TWO 1.5V(AA size) alkaline battery<br />◆Probe:<br />Nominal Frequency: 2.0 MHz<br />Working Frequency: 2.0 MHz ± 10%<br />Overall Sensitivity : >100 dB<br />Negative Peak Sound Pressure : p_ < 0.5 MPa<br />Ultrasonic Output Intensity:Isata < 5 mW/cm2<br />Ultrasound Output Power: P < 10 mW<br />Working Mode: Continuous wave doppler<br />Effective Radiating Area of Transducer: 208 mm2 ± 15%<br /><br />Physical Characteristic<br /><br />Dimension: (L) 135 mm × (W) 95mm × (H ) 35 mm<br />Weight: About 180 g (including batteries)<br />Qualification<br /><br />Passed FDA and CE<br /><br />Accessories<br /><br />Standard:3M straight probe