features：
▪ listen to the fetal heart sounds by itself or cellphone.
▪ monitor fetal heart rate and show fetal heart curve view by app.
▪ you can share fetal heart sounds by e‐mail or other communicat ion networking with app.
▪ green light f lashes when capturing the fetal heart beat.
▪ red light indicates abnormal of fetal heart rate.
specification:
measuring mode: real-time
ultrasound frequency: 2.5mhz
dimension: 119×65×54(mm)
net weight: 155±5g
volume: adjustable
battery type : iec6f22 9v alkaline
data transmission: wired