The Sonicaid D920/D930 by Huntleigh is a state-of-the-art digital Doppler unit designed for superior fetal monitoring. With over 40 years of experience in fetal monitoring, Huntleigh has combined excellence in probe performance with digital signal processing to provide superb digital audio using their unique Dynamic Digital Noise Reduction (DDNR) system. The Sonicaid D920/D930 offers high sensitivity probes, waterproof features suitable for waterbirth, and an easy clean probe for improved infection control.