No additional power supply is required, and no is required. Just need a USB data cable 3.5 inch display with multiple themes Support horizontal and vertical screen switching, rotation Energy saving and environmental protection, automatic shutdown screen Comfortable eye protection, stepless adjustment of screen brightness One-click operation, change background image, switch theme Automatic-start at boot Set weather forecast city Compared with AIDA64 and other monitoring software, it takes up almost no resources when running Visual theme editor, drag your mouse to realize your creativity Parameters: Display area: 49 x 74mm/1.9 x 2.9 inch Overall size: 55 x 85mm/2.2 x 3.3 inch Resolution: 320x480 Thickness: 7~8mm (0.3 inch) Viewing angle: IPS full viewing angle Interface: USB-TYPE C Colour:black Material:Metal + Plastic Package Contents: 1 Set * Screen Display Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.