都可以的， 详细请见：http://www.door2doorshop.com/wholesale/4Mhz-Probe-Sonotrax-B-Fetal-Doppler-1305.html
RFD-B handheld Doppler can meet routine examination requirement of obstetricians, midwives, pregnant women and vascular. It is a high performance model with FHR digital LCD display. It has three heart rate processing modes: real-time FHR display mode, averaged FHR display mode and manual mode. It has audio output, and can connect with earphone or recorder with audio input. RFD-B has a slim, power saving and interchangeable ultrasound probe.
Feature:
Easy to use
Accurate FHR detection and LCD display with the backlight on or off
Built-in speaker for listening to the heartbeat without headphones
Headphone jack for listening to the heartbeat or attaching to the computer with the included accessory for recording the heartbeat
2 AA size batteries
Low battery consumption and Auto OFF feature
Battery icon indicates how much battery life is left
Fetal Doppler Displays Three Modes:
Mode 1: This mode displays fetal heart icon when fetal heart beat is detected and also displays the real-time heart rate numerically.
Mode 2: This mode displays the fetal heart icon when the fetal heart beat is detected and averages the fetal heart rate for a more stable reading.
Mode 3: This mode can calculate an average fetal heart rate over a specific period of time by manually pushing a button to start and stop the time.
Probe features:
4MHz water resistant Doppler probe ensures a high-sensitivity probe that cannot be damaged by transmission gel
Doppler Cord is rubber coated to protect it from the elements and coiled for plenty of stretch
Doppler Probe easily detatches from the main unit for storage
Earphone jack for listening or attaching fetal doppler to the computer with the included accessory for recording the heartbeat
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