Portable Fetal Baby Heartbeat Monitor, Home Use Shipping Healthy Baby. 1. High quality Using ultrasonic transducer with high sensitivity and high precision digital display; Ultra-low-intensity ultrasound output with extremely high security quality.Power supply mode: 2 * 1.5V AAA 7 batteries(not included)Dimensions: 117 x 57 mm 2. Safe The fetal heart rate can be tested at any time. It's safe and has no radiation. The beautifully designed and lightweight device gives parents a wonderful experience of hearing their child's movements and helps promote intimacy in early pregnancy 3. Convenient The fetal heart rate can be monitored at home, it is very portable, high-precision, and there are no big mistakes 4. Give a gift to your loved one Plug the headphone jack jack into the main unit, hear the baby's voice in a quiet environment, and give a gift to your loved one who can hear the baby's voice in the womb Product Features: Use high-sensitivity ultrasonic transducer and high-precision FHR LCD digital display Ultra-low intensity ultrasound output, with extremely high safety quality Product Description Material: ABS Dimensions: 117 x 57 mm Power supply mode: 2 * 1.5V AAA 7 batteries(not included) Gross weight: 131g Quantity: 1 pcs Package content: 1 pcs * Fetal heart rate