This BF-510 Pocket Fetal Doppler is our new model.
It has an inside probe with 2.0MHz probe which can be used for detecting Fetal Heart Rate(FHR) very easily and conveniently at home, clinic and hospital.

For this model there is no LCD display to show FHR.
It comes up with a headphone to hear FHR very clearly.
It can work with dry battery or rechargeable battery.

Please find the following specifications:
Ultrasonic frequency: 2.0MHz
Power: 9.0V dry battery or 9.0V recharge battery
Ultrasonic intensity: ¡Ü10mW/cm2
Work time: ¡Ý4 hours