features：
▪ the ultrasound is lower than the national ultrasonic power standard by over 50%
▪ compact and portable design provides a convenient use and carrying.
▪ large backlight lcd displays the fetal heartrate.
▪ interchangeable waterproof probe.
▪ built-in speaker gives clear and loud voice.
▪ automatic shutdown function in case of no work for one minute.
▪ fully charged battery enables to work continuously for over 10 hours.
▪ high sensibility can detect the pulse of 12-week fetus.
▪ three calculation modes to calculate fetal heart rate:instant,10 second average and manual.
specification:
display:lcd display
heart rate range: 50-210bpm
audio output power:0.5w
size:135mmx84mmx33mm
weight:main body 0.43kg