| Fetal Doppler_DS120A Specification Table | Bitmap |
| Physical specifications |
| Weight(with 7.4v li-ion batties) | 300g |
| Weight(without batties) | 250g |
| Main Unit | 145(L)×100(W)×40(H)mm |
| Probe | 33(Ф )×100（H）mm |
| Display | 39mm×27mm LCD Display |
| Operation Environment: |
| Temperature | 5ºC to 40ºC |
| Relative Humidity | <85% (noncondensing) | |
| Atmospheric pressure | 86kpa to 106kpa | |
| Storage/Transportation |
| Temperature | -10ºC to 55ºC | |
| Relative Humidity | <93% (noncondensing) | |
| Atmospheric pressure | 86kpa to 106kpa | |
| Ultrasound |
| Frequently | 2.0MHz±5% or 3.0MHz±5% Continous wave | |
| Sensitivity? | ≥90dB(within 50mm,75mm,100mm,200mm) | |
| Valid area of ultrasound | 398±2mm² | |
| Ultrasound Intensity | <5mW/cm² | |
| FHR Measuring |
| Range | 30-240BPM(Beat per minuter) | |
| Accuracy | ±1% | |
| Resolution | 1BPM | |
| Averaging | 8 Beats | |
| Sensitivity | 18weeks | |
| Power Supply |
| Battery | Built-in 7.4 volt rechargeable Li-ion battery | |
| Continuous working hour | >4 hours | |
| Others |
| Measuring Mode | Mean, Average, Continuous, Backlight | |
| Display | 3 digital FHR,Battery low,Voice,Ultrasound frequency,Mode type | |
| Button | on/OFF, Voice Control, Mode Change | |
| Audio Output | Loudspeaker or Earphone | |
| Audio output power | 0.5W | |
| Auto Shot Off | 20s | |
