SpringBud FD-350B Fetal Doppler tracks a baby’s heartbeat with a 3MHz Probe by using the latest technology. It allows new moms to hear the heartbeat of their babies in an easy way and reduce anxiety. It comes with an LCD screen, built-in speaker and headphone jack. The LCD screen displays the battery status, and heart rate in BPM (Beats Per Minute). Notice: Please be aware that this device is used for hearing a baby’s heartbeat only. It is not a replacement for regular doctor visits. Features: 1. High sensitivity doppler probe 2. Easy to use 3. Output for headphones and built-in speaker 4. Clearly hear your baby’s sounds of heartbeat 5. Real-time FHR display on the LCD screen Free 2 batteries + 60g Aquasonic100 ultrasound transmission gel Included.