It's used for detecting the fetal heart rate(FHR) at hospital, clinic, family. Easy to useLCD displayBuilt-in speakerDirection of FHR value over-limitationBuilt-in rechargeable batterySpecification: Ultrasonic Frequency: 2.5 MHzDimension: 60(L)x35(W)x130(H)mmWeight: 0.5kgContinuous work time: 8 hoursPackage: 22x17x7cm/unit
