Detailed Description
Could you clarify what you want exactly? Are you asking me to fix the tabs so that when you click "Product Details", "Specifications", and "Reviews", they switch the content (instead of being static)? Or do you want to fill in a sample "long description" for a Smart Watch? From your earlier message ("tabs are not working"), I guess you want the tab functionality. Problem: Right now, your tabs are just buttons without any JavaScript to switch content. That's why clicking them does nothing.