Battery cover missing..can be easily secured by board and tape.. This Huntleigh D920 Pregnancy Dopplix Doppler is a reliable and efficient tool for monitoring fetal heart rate during pregnancy. It is designed to provide accurate readings to help healthcare professionals track the baby's progress and detect any potential complications. The doppler is made by Huntleigh, a trusted brand in the industry, and is ideal for use in hospital surgical theatres and clinics. The doppler is specifically designed for use during pregnancy and has been shown to be highly accurate. It is easy to use and provides clear, reliable readings that can be interpreted by healthcare professionals. This doppler is perfect for those who want to ensure that their baby is progressing smoothly and without any complications.