Features: 

  ♥Safe:the ultrasound is lower than the national ultrasonic power standard by

over 50%.
  ♥Automatic shutdown after 1 minute without operation.
  ♥High sensibility can detect the heart rates of 12th week fetus.
  ♥Three calculation modes to calculate fetal heart rate: instant, 10 second
average and manual.
  ♥Ultrasonic frequency: 3.0MHz ±3%
  ♥Power:AA*2 ,Battery status indicator 

  ♥  Portable:compact and portable design provides a convenient use and
carrying.

  ♥  LCD display:carge backlight LCD displays the fetal heart rate.

  ♥ Loudspeaker:cuilt-in speaker gives clear and loud voice.

  ♥  Interchangeable waterproof probe.

 ♥Two pieces of standard 1.5V alkaline battery available which can work no less than 10 hours.