Chx-3a pocket fetal doppler ( lcd display ) It's used for detecting the fetal heart rate(fhr) at hospital, clinic, family. Easy to use Lcd display Built-in speaker Direction of fhr value over-limitation Built-in rechargeable battery Specification: Ultrasonic frequency: 2.5 mhz Dimensionú¦60(l)* 35(w)* 130(h)mm Weight : 0.5kg Continuous work time: 8 hours
