3MHz High Sensitivity Heartbeat Monitor, Heart Rate Detector Sonar Handheld Household How to use: Before using it for the first time, make sure 2 batteries are in Please make sure that your gestational age has reached more than 12 weeks Press the power button to power on, then adjust the volume Lie flat with a cushion pillow, keep legs straight and relax Use the correct couplant. Any other gel is unusable. When using the couplant, make sure to apply enough couplant. A small amount and too thin couplant may not detect your baby's heartbeat. Attach the probe to the abdomen to locate the position of the fetus and find out the best direction to the fetal heart After hearing regular fetal heart sound, the value will display on the screen in real time Note:Do not use high pressure water gun to flush and drive at too high speed within 24 hours (do not exceed 80-100 yards), all can be normal after 48 hours! Feature: Large probe, high sensitivity, 0 radiation, convenient measurement (low power, 0 micro radiation, high performance, intelligent dynamic monitoring) Large-screen LCD display readings more clearly (4.5cm large-screen LCD display, so that pregnant women with poor vision can also just their own fetal heart rate data, more convenient to ease the degree) Using clear tuning chips, the sound is more realistic Fetal health can be grasped at any time. Whether at home, office or travel, you can always listen to fetal heart rate Note: Please allow minor errors due to manual measurement. Item color displayed in photos may be showing slightly different since monitors are not calibrated same. Package: 1pc of Fetal doppler (not included battery)

100% brand new & high qualityReliable FHR detectionHigh sensitivity probe, low ultrasound powerBuilt-in speaker and audio outputThe probe is large, sensitive, 0 radiation, easy to measure.You can share your joy - a healthy and strong heartbeat with your lover, families and friends