1. 2. 4 inch Black& White LCD display
2. Accurate FHR detection，FHR displayed with curve and value
3. Maternal SpO2 and heart rate is available
4. Rechargeable Li-ion battery and battery capacity indicator
5. High sensitive, 1MHzor2 Mhz doppler transducer
6. Pulsed Doppler operation, advanced in the world.
7. Date and time function.
8. Maternal SpO2 and heart rate are available
9. Long time continuous use (more than 4 hours)
10. Auto power off for energy saving