... Nautilus Ultrasound Transducer Watertight, Button, 8' Cable Features/BenefitsUnique 9-Crystal ultrasound design for ease of ... even with a preterm or obese motherWatertight for hydrotherapy monitoringSpecificationsButton style, 8' CableSold as ... fetal monitors Corometrics 116, 118, 120, 150, 151, 155,170, 250 Not compatible with Corometrics 115 and 145. 5700HAX Nautilus Ultrasound Transducer ...