hospital use 3 mode fetal heart monitor
1.       Low ultrasonic power
2.       Power saving
3.       Compact and portable
4.       Easy carry and operate
5.       Three calculation mode of FHR
6.       Built-in loudspeaker and LCD display
7.       Waterproof probe
8.       Probe: anti-shock and anti-falling down
9.       High sensitivity
10.   Rechargeable battery