Features: brand new and high quality CB1 is a computing core board similar to CM4. High performance CPU: Quad-core Cortex-A53 PI4B with CB1 installed, the performance can be close to 3B, and can also be used instead of 3B. Because of the modular form, PI4B and CM4 have high modularity, which is convenient for users to use DIY. With high cost performance, can become a low-cost choice for 3D printer users who use ordinary motherboards to run Klipper. Specifications: Item Type: Motherboard Model: BTT CB1 Board CPU: Quad-core Cortex-A53 BTB- transposon: same as CM4 CPU: Allwinner H616, Quad-core Cortex-A53 1.5GHz GPU: Mali G31 MP2, support OpenGL3.2 Memory: 512MB/1GB DDR3L SDRAM Display: HDMI-compatible 2.0A interface, support 4K display USB 2.0 port 100M Ethernet + 100M WiFi The same BTB-header as the CM4 Size: approx 55x40mm/2.16x1.57in Package Includes: 1 PC x BTT CB1 Motherboard note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank yo