This computers monitor no need additional power supplys, just need a USB cable to achieve its functions. The 3.5inch screen has multiple themes for you to use directly. You can use it to monitor your computers easily. Features: This computers monitor no need additional power supplys, just need a USB cable to achieve its functions. This LCD monitor can be used in various Linux systems such as Wins and Raspberry Pi. There are several configuration themes on the system to help you get started as soon as possible. This computers monitor can help you to understand your computers more easily and comprehensively. The portable size makes it suitable for directly installing on the chassis. Specifications: Material: printed circuit board Type: a screen, screen+base, screen+base+ USB hub (optional) Screen size: 3.5inch Item size: 92 * 58 * 7mm / 3.6 * 2.3 * 0.3in Item weight: 44g / 1.6ounce Package size: Screen: 120 * 92 * 70mm / 4.7 * 3.6 * 2.8in Screen+base: 120 * 92 * 70mm / 4.7 * 3.6 * 2.8in Screen+base+ USB hub: 205 * 136 * 110mm / 8.1 * 5.4 * 4.3in Package weight: Screen: 124g / 4.4ounce Screen+base: 206g / 7.3ounce Screen+base+ USB hub: 289g / 10.2ounce A Screen Packing List: 1 * Screen 1 * Cable 1 * Bracket OR Screen+Base Packing List: 1 * Screen 1 * Cable 1 * Bracket 1 * Base OR Screen+Base+USB Hub Packing List: 1 * Screen 1 * Cable 1 * Bracket 1 * Base 1 * USB Hub