First Full Color OLED Fetal Doppler with FHR curve in the world!

Features 
Light weight and Easy to use
Color OLED display FHR value, FHR intensity, improper FHR alarm signal, speaker volume, battery capacity indicator, working mode, frequency of the probe and FHR synchronization symbol. 
Accurate FHR detection. It has FHR mode, average FHR mode, manual count FHR mode and count-down FHR mode.
Detection and indication of probe off.
Improper FHR alarm value adjusted, the red/orange/greed FHR value indicates different alarm class.
Turn to power saving mode automatically without signal within 30 seconds.
Auto shut off without signal within 2 minutes.
Earphone port supports FHR sound output to earphone or recorder. 
Friendly human-machine interface for menu selection. 
Standard 9V alkaline battery is available for power supply, which can support 300 minutes continuous work.
Support multinational language according to customer requirement.

Display 
Color OLED display FHR value, FHR intensity, speaker volume, battery capacity indicator, working mode, frequency of the probe and FHR synchronization symbol.