CHX-2C+   CHX-2C+ Portable Fetal Doppler (LED Display ) It's used for detecting the fetal heart rate(FHR) at hospital,clinic,family. ＊ Easy to use ＊ LED display ＊ Built-in speaker ＊ Sound alarm function when FHR is out of the normal range ＊ Built-in rechargeable battery Specification: ＊ Ultrasonic Frequency: 2.5 MHz ＊ Dimension：185(L)* 190(W)* 130(H)mm ＊ Weight : 1.3kg ＊ Continuous work time: 8 hours Configuration: Rechargeable battery、Charger、Manual