A-100C Ultrasonic Fetal Doppler is a high performance fetal heart beat detector with color OLED displaying FHR value, which can meet routine examination requirements of obstetricians. It is applicable for the private obstetrician's office, antepartum clinic, obstetrical department of hospital and remote monitoring situations, or using at home. Product Description Features? Lightweight and Easy-To-Use. Full color OLED display FHR value, FHR intensity, speaker volume , battery capacity Indicator, working mode, frequency of the probe and FHR synchronization symbol. Accurate FHR detection. It has FHR mode, average FHR mode, manual count FHR mode and count-down FHR mode. FHR curve display and 30 minutes curve replay function. Detection and Indication of probe off. Improper FHR alarm value adjusted. The blinking of FHR digit indicates improper FHR value. Turn to power saving mode automatically without signal within 30 seconds. Auto shut off without signal within 2 minutes. Earphone port support FHR sound output to earphone or recorder Friendly human-machine interface for menu selection. Standard 9V alkaline battery is available for power supply.which can support 300 minutes continuous work. Support multinational language according to the customer requirement.