Main Specs. for the CE Approved Fetal Doppler M168B:

Model 168B (Blue), a type of hand fetal Doppler, could meet the needs in the obstetrics department and clinics, especially the needs of the pregnant for daily examination at home. Model 168 B, with earphone, has the function of displaying all-time fetal heart rate. With a USB interface port, data of real-time fetal heart rate can be uploaded to the computer, based on which fetal heart rate curve can be formed by the software FHR-INTERNET. Those data and fetal heart tones could be email to doctors of or hospital. The special function of the software FHR-INTERNET makes it possible to reshow the fetal heart tones and fetal heart rate, reliving the monitoring situation, helpful for the doctors in diagnotic.
With Build in Battery, could be recharged via USB port

* with a large piece of built-in supersonic crystal, convenient for the pregnant to locate the fetal heart.
* with an ability to display fetal heart rate and USB interface port
* with a fetal movement button, recording the times of fetal movement.
* with an ability to catch the fetal heart tones of a 12-week-old or elder fetus
* with lovely outline.

Features:
Screen: 25mm*15mm
Ultrasound frequency: 3. 0MHz
Output intensity of ultra sound: < 10Mw/cm2
Scope of FHR measurement and display: 40~220bpm
Accuracy of FHR Measurement: 1bpm
Power Supply : 9V dry batteries; or Matching Li-ion rechargeable batteries
Continuous working time: > 4 hours
Outer size: 100mm*90mm*40mm
Wight: 250g
Communication port: USB2. 0