* 3.5”inch color LCD display
  * Ultrasonic wave mode: Continuous wave or Pulse wave
  * Built-in speaker.
  * Automatic switch-off.
  * Waterproof Interchangeable probe
  * Various FHR Display mode : Graph Mode , Large Number Mode(real-time and average time), Manual Mode
  * Volume indication、battery energy indication、Probe Frequency Display, Date and Time display.
  * Sound alarm function when FHR is out of the normal range
  * Built-in rechargeable batteries, continuous working time ≥8 hours
  * Set-up mode for function setting.