This item is a portable Fetal Doppler (Model: JSL-T501), a handheld ultrasound device used to detect and listen to a baby's heartbeat.
Technology: Uses ultrasound waves and the Doppler effect to amplify heart sounds.
Display: Features a digital LCD screen showing the real-time heart rate in beats per minute (BPM).
Usage: Typically used after 16 weeks of pregnancy, requiring a transmission gel on the abdomen for effective sound conduction.
Specifications: Often includes a high-sensitivity probe (e.g., 2.5MHz or 3.0MHz) and built-in speaker with adjustable volume.