The Raspberry Pi 4 Model B is a high-performance single-board computer with USB 3.0 ports and dual HDMI outputs. - Model: Raspberry Pi 4 Model B - USB Ports: 2 x USB 3.0, 2 x USB 2.0 - HDMI Ports: 2 x micro HDMI - Ethernet Port: 1 x Gigabit Ethernet - Power: USB-C power input - Memory: 4GB Thank you for viewing. Even with an SD card inserted, there was no HDMI output or screen display, and OS startup could not be confirmed. The detailed cause is unknown, so this is being sold as a junk item. Please purchase only if you understand its intended use, such as for repairs, parts, or electronic projects. Due to being a junk item, returns and refunds are not accepted for any reason.