Features:
  Pocket Fetal Doppler mainly applies to detect the fetal heartbeat rate from the twelfth week;
  LCD can display FHR accurately;
  Built-in rechargeable battery can work continuously more than 5 hours;
  Only 220g, can be carried conveniently with a gallus;
  Alarm function when FHR is out of the normal range or battery power is in shortage;
  Built-in speaker and collocated with earphone jack;
  2.5MHz probe and easy to replace. 
Specification:
  Executive Standard: EN61266: 1995
  Ultrasonic frequency: 2.5MHz±10%
  Ultrasonic intensity: ≤10mW/cm2
  Comprehensive Sensitivity: ≥90dB
  FHR range: 60-210bpm(±2bpm)
  FHR alarm range: ≤100bpm or ≥160bpm
  Isptp: ≤0.1MPa
  Battery: 9.6VNi-MH rechargeable batteries
  Adapter input voltage: AC 110V±10% 60Hz or 220V±10% 50Hz
  Rechargeable battery input voltage(no load): DC 12V±1V
  Maximum audio output intensity: ≤1W
  Doppler frequency: 100--3000Hz
  Static continuous working time: ≥5h
  Working temperature: 10-40ºC
  Humidity: ≤80%
  Atmospheric pressure: 86--106kPa
Package:
  Single Unit Dimension: 24cm x 23cm x 12cm Gross Weight: 1.5kg
  20 pcs/carton Dimension: 44cm x 36cm x 42cm Gross Weight: 15kg
  Normative collocation: charger, gallus, operation manual, approval certification, warranty card