Instructions 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. The device uses color LCD of high resolution to display the fetal heartbeat waveform, integrated the function of time display and menu control, calculating the FHR, FHR data, heartbeat waveform and heartbeat sound memory, wave review, and it can communicate with PC, transfer the data to PC software to display and print the heart rate trend graph, which can help the doctor diagnose and manage the case in time. It contains components of ultrasonic signal transmitter and receiver, analog signals processing unit, FHR calculating unit, LCD display control unit, efficient signal memory and read 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 ■real-time clock display ■three test modes: real-time, average, manual ■Chinese and English display and adjust ■The probe has bending structure which is easy to operate and can increase the ease of the pregnant women, incarnating the humane design ■The probe can be changeable ■Probe inspection ■FHR values, bar graph and heartbeat waveform color screen display ■Alarming in red when the FHR range is out of the normal range ■memory and review ■observe the heart rate trend graph by PC software, manage the memory cases ■Battery status indicator ■Built-in speaker ■Output for headphone. ■Auto power-off when there is no operation in one minute ■Two pieces of standard 1.5V alkaline battery available which can work no less than 8 hours Main performance ■Display: 1.77"262K TFT display ■FHR Performance: FHR Measuring Range: 50~240BPM (BPM: beat per minute) Resolution: 1 BPM Accuracy: ± 2 BPM ■Power consumption: < 1 W ■Auto Shut-OFF: Automatic power-off when there is no operation in one minute ■Battery Type Recommended: TWO 1.5V(AA size)alkaline battery ■Probe: Working Frequency: 2.0 MHz ± 10% Ultrasonic Output Intensity: Isata < 5 mW/cm2 Ultrasonic Output Power: P < 10 mW Working Mode: Continuous Effective Radiating Area of Transducer: 157 mm2 ± 15% Physical Characteristic Dimension: (L) 135mm × (W) 92mm × (H)29mm Weight: About 245g (including batteries)