Compatible with BIA Body Composition Measurement and Heart Rate Monitoring Feature with precise Button Cut-Out design All-around scratch defense with shock-absorbing material Rugged design with an adjustable band with a durable metal clasp Raised bezels around the screen for extra screen protection (Bazeling rotations can be difficult) Precisely designed for the Galaxy Watch 4 Classic 46mm. Fits 5.1 inch to 9.1 inch (130mm - 230mm) wrists.