This is a product that subverts the traditional fetal heart test from the way of use. The top is added with a round shape. The detection part can be pressed after being buckled with the index finger, which is more conducive to the user's grasp of strength and accuracy. Finger buckle made of silicone material, strong comfort. Smooth and concise shape has both a sense of science and technology and a sense of roundness, bringing a good experience for pregnant women.