Sonoline B/SONOTRAX B Pocket Fetal Doppler is a hand-held fetal heart rate detecting device adopted Doppler theory. It outputs sound signals through headphone. With easy and convenient operation, it can be used in hospital and clinic for daily self-check by pregnant woman, realizing early monitoring and care for life.


  • Built-in speaker
  • Three working mode: Real-time FHR Display Mode, Averaged FHR Display Mode and Manual Mode
  • LCD screen
  • Battery status indication
  • Auto shut off if there is no signal within 1 minute
  • High sensitive doppler probe, fetal heart sound can be heard clearly for pregnancy more than 12 weeks
  • Low consumption, two AALR6 batteries can last more than 8 hours for normal use
  • Pluggable USB probe interface, probe can be replaced