▪ high sensitive ultrasound .
▪ detect the heart rates of 12th week fetus.
▪ automatic shutdown after 1 minute without operation.
▪ built-in loudspeaker.
specification:
display: lcd screen
performance: fhr value, volume, fhr mode, battery status
range&accuracy: fhr measurement range: 50~210 bpm
accuracy: ±2bpm
measuring modes: real-time, average and manual counting
ultrasound frequency: 3.0mhz
dimension: 260×96×35(mm)
net weight : 250g±5g
backlight and speaker: backlight, adjustable volume
battery type: 7.2v ni-mh(rechargeable)or aa×3