Huntleigh Obstetric Dopplers include audio only and models with digital displays. The FD1+, FD3, D920 and D930 feature waterproof probes. The FD2 Obstetrical Doppler features interchangeable 2mhz or 3mhz probes.
When choosing your Huntleigh fetal Doppler, there are two popular probe options to suit your specific needs. The 2 MHz is a general-use Obstetrical Probe that detects FHR as early as 10 weeks, while the enhanced 3 MHz Obstetrical Probe detects FHR as early as 8 weeks.