It's used for detecting the fetal heart rate(FHR) at hospital, clinic, family. Easy to useWithout LCD displayBuilt-in speakerAudio outputAutomatic switch-offMulti-colour of mainSpecification: Ultrasonic Frequency: 2.5 MHzDimension: 100(L)x30(W)x135(H) MmWeight: 0.5kgContinuous work time: 8 hoursPackage: 22x17x7cm/unit
