SRF618E is the compact and improved type of fetal heart rate Doppler detector, which performs excellently in:
Accurately detect FHR with digital LCD display and built-in speaker.
Multi-displaying of FHR: Transient FHR, auto mean FHR, manual calibrating.
Intellectual cancellation of erroneous FHR; Alarm on over-limited FHR
Indication of the volume and endurance of the power.
Automatically power off if there are no signals of FHR received within 2 minutes to save energy.
Battery power supply.