The Edan 02.01.210721 is a high-sensitivity 2 MHz fetal probe specifically designed for the SD3 series ultrasonic pocket dopplers. It features a waterproof construction, making it suitable for water births and easy sterilization between clinical uses. This interchangeable probe is optimized for deep penetration, allowing for reliable fetal heart rate detection in the later stages of pregnancy and for patients with a higher BMI.