1.Ultrasonic of small doses, below the National Safety Standards of the ultrasonic power for more than 50%
2.Delicate, portable, user-friendly
3.FHR displayed by LCD(FHR's normal range: 120-160bpm)
4.Counting manually model of showing FHR real-time
5.Built-in speaker
6.A warning function
7.Battery state showing
8.Automatically shut down
9.3 pieces of 5# dry battery or chargeable 5# battery can supply the machine for consecutive 10 hours or more
10.Examining the Cardiovascular Wall Throb of fetal 9 weeks old or more