Features: brand new and high quality 4x USB 3.2 Gen1 ports, USB 3.0 / 2.0 / 1.1 compatible. Flexible power supply options: powered from either PCIe 12V, OR from 12V for DC header. It does not support direct access to the PC motherboard, and an extension cord is required. Onboard VL805 chip, driver free, plug and for play. Supports USB Devices Like USB Flash Drive, Mouse, Keyboard, Headphone, Mobile SSD. The Compute Module 4 IO Board is a companion board for Compute Module 4. Specifications: Material: Metal Size: approx. 82x39mm/3.22x1.53in Package Includes: 1x Expansion Board note: This product does not include CM4 and CM4 base plates, please purchase separately if necessary. Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.