Fetal heart beat indicator.
Instantaneous FHR.
Averaged FHR.
Manual calculate FHR.
Brightness mode.
Auto shut off without signal within 1 minute.
Battery indicator and Low battery shut off.
Optional rechargeable battery(9v) and charger.

SonoTech is a Advanced obstetrical unit, which used to detect the FHR (Fetal heart rate), can meet routine examination requirements of obstetricians. The device is consists in the following procedure:
Ultrasonic signal emit.
Analog signals process.
Fetal heart rate calculate and display.
It has a speaker inside, and an audio output can be connected with earphone or audio recorder.
It use standard 9 Voltage DC battery.