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 |
