3 Modes Baby Heart Rate Detection Instrument Baby Heart Instrument Monitoring Household Pregnant Prenatal Baby Heart Rate Detector

* Note: You need to bring your own couplant * Product description: 9 weeks testable * 3 Mode: Transient Mode Average Mode Manual Mode * Mode switch key description: When the instrument is turned on or working, press the "M" key; Curve model: switch between "curve display" and "digital display" at will; Digital models: Press the "M" key to switch between average, transient, and manual modes (three modes switch) * Three modes: 1. The default average mode (average data measured in 8 seconds) is turned on, and Avg is displayed; 2. Press the "M" key to enter the instantaneous mode (data measured in 2 seconds), and display Trs; 3. Press the "M" key again to enter the manual mode and display Man; When switching to manual mode, press the "▲" button to start the test, and when you hear the fetal heart rate for the tenth time, press the "▼" button to end, and the fetal heart rate can be displayed; * Weight: about 173g, including color box about 261g * Packing size: about 175*115*5