Song number display blue dry electricity uSONO 802

1).High sensitivity  

2).Autocorrelation algorithm

3).Intelligent noise reduction

4).TFT or Led Color screen

5).removable battery or build in battery

6).automatic shut down

7) FHR values, bar graph and heartbeat waveform color display

8) Alarming in red when the FHR value is out of the normal range.

9) Probe falls off detection, battery status indication

10) Audio interface: Can be connected to other recording devices by recording cable, record fetal heart sound in real-time