Compatible models: For Samsung Galaxy S21 5G SM-G991U SM-G991U1 and other US versions. Please confirm your phone model before purchasing.Product quality: This is a 100% original component that can solve problems such as your phone not being able to charge, slow charging, poor signal, etc. Installation: Our product comes with repair tools, but we recommend that you go to a professional mobile phone repair shop for installation, as replacement requires professional repair skills and improper operation may cause product damage. Testing: We will conduct strict testing on the product before shipment to ensure its proper functioning, Package includes:1 S21 USB charging port+1 set of repair tools