The Model 174 Intrapartum Monitor is compact and light weight in design while maintaining the same high quality fetal monitoring features you have come to know from Corometrics monitors. The wide beam 9-Crystal Nautilus optional Watertight Ultrasound Transducers provide the fetal heart rate and acquire the signal easily and quickly. The Nautilus optional Watertight Toco transducers' design have no protruding "button" to press into mom's tummy so they are more comfortable for the patient and they are easy to keep clean.