Smart wrist ring is most widely used in wearable smart equipment. The user can record real-time data related to exercise, sleep, diet, etc. and synchronize it with mobile phones and tablet computers and other devices, instructing healthy life via data. Polyurethane reactive hot-melt adhesive is mainly used for adhesion of touch screen, buttoms and decorations. It also adapts to various materials of smart electronic devices with good adhesion, strength and reliability.It is also environmental-friendly with no  volatilization of hazardous materials.Thus, it is the top adhesive choice for  wearable smart equipment.