Fangrui Product Details 1. The 3.5-inch Computer Secondary Screen Only Needs A Usb-c Connection, And The Biggest Advantage Is Reflected. For The Computer, It Is Not Actually A Separate Display, But A Usb Serial Port Device, So Naturally It Not It Affects The Graphics Card Occupancy And The Mouse Cursor Running To The Secondary Screen. 2. All Settings Are Completed Through This Software, And You Can Customize Some Settings. The Software Actually Takes Up More Cpu Performance And Basically Does Not Involve Gpu Performance, So It Is Beneficial For Games. 3. If It Is Built Into The Chassis, You Can Choose An Adapter Cable Or A 9-pin Usb Adapter Board. If You Happen To Find That The 9-pin Usb Port Inside The Chassis Is Occupied, You Can Purchase A One-to-two Expansion Pin. 4. Please Use Win10 Or Above System. Win7 Requires Additional Driver Installation. 5. No Additional Power Supply Required, No Required, Just A Usb Data Cable Description: 1. Display Area: About 49x74mm 2. Overall Size: About 55x85mm 3. Resolution: 320*480 4. Thic