Instructions Sonoline A 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 etc.It has audio output and can be connected with earphone or recorder with audio input. Main Features ■ Battery LED indicator ■ Low power inspection of the battery ■ Built-in speaker ■ Output for headphones ■ The probe can be changeable ■ Probe inspection ■ 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 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 Working Frequency: 2.0 MHz±10% Ultrasound Output Power: P < 10 mW Ultrasonic Output Intensity: Isata < 5 mW/cm2 Working Mode: Continuous wave doppler Effective Radiating Area of Transducer: 208 mm2±15% Physical Characteristic Dimension:(L)135mm × (W)95mm × (H )35mm Weight: About 180g (including batteries) Qualification Passed FDA and CE