Can be used for baby, stroke hemiplegia, sputum cough, muscle pain patients, etc. Special hollow arc cover with ergonomic design, repeated tapping the back to achieve blood meridian and vibration sputum effect. Silicone material, high elasticity, no deformation, uniform, feel comfortable to grip and use. Making the phlegm- resolving work more efficient and safer, bring huge convenience. Provide a more convenient way for nursing work, create more easiness for parent, baby, patients, nurse, etc.