Capable of accurately detecting fetal heart rates, this heart rate monitor is suitable for use with hospitals as well as obstetricians. The SF40E is lightweight, easy to use and maneuver. It includes a bright, digital LCD display that lets you view heart rates in three different modes. This includes real time as well as average and manual. It further includes a built-in speaker with audio output that can work in conjunction with earphones or a recorder. Battery operated, it provides for automatic shutoff when not in use. This device is interchangeable with an ultra-sound probe.