ROC-RK3399-PC-PLUS is a mini PC motherboard, about the size of a small phone. Dual-core Cortex-A72 up to 1.8GHz & Quad-core Cortex-A53 up to 1.5GHz Six Core Processor Mali-T864 GPU,Support OpenGL ES1.1/2.0/3.0, OpenCL1.2, DirectX11.1. LPDDR4 RAM (4GB) 3 x USB 2.0 10/100/1000Mb Eth interface IR Infrared Module HDMI 2.0a with HDCP 2.2 DisplayPort 1.2 (4K 60Hz) 3 x MIPI interfaces :MIPI0 only for DSI, MIPI1 for DSI or CSI, MIPI2 only for CSI eDP 1.3 I2S,Support 8 Channels High speed eMMC Expansion Interface MicroSD (TF) Card Slot 1 x Type-C Interfaces :Type-C0 support DP 1.2、USB3.0 RTC : battery model -- CR1220 ; Battery seat -- CR1220,BS-12-A3B0J002 132 Pin Expansion Interfaces:I2C、SPI、Uart、I2S.... Shipping list (Only for reference ) 1 x ROC-RK3399-PC-PLUS 1 x Type-C data cable Maybe you need to purchase the following accessories: SD card、emmc USB Serial Adapter 12V power adapter