Description
| Acoustic working frequency | 2.5 MHz ± 5% | 
| Overall sensitivity | ≥90 dB | 
| Ultrasound output power | < 20mW | 
| FHR display range | 50 – 210 bpm | 
| Resolution | 1 bpm | 
| Precision | ± 2bpm | 
| Power supply | Internal | 
| Battery | 3.7V 1180 mAh lithium battery | 
| Dimension | 139mm x 82mm x 18mm | 


 
            
        


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