* Applicable to detect fetal heartrate from the twelfth week
* Built in loud speaker with connection to recorder and earphone
* Big LCD of 3x23cm with backlight
* Two operation mode of realtime FHR and average FHR
* Compatible with AA alkaline battery or AA rechargeable Ni-MH battery
* Automatic power of fin 1 minute without any operation
* Sound alarm for FHR beyond normal range and lower battery capacity
* Indication of volume, battery capacity, FHR dynamic graph
* Water proof interchangeable probe of 2.5MHZ
* Two color for choice blue and pink
* 8 hour of continuous operation