1. The CB1 core board is a computing core board similar to the CM4 for 2. CB1 core board can be equipped with PI4B expansion board, the performance can be close to for 3B, and can also be used instead of for 3B 3. Due to the modular form, CB1 has a of modularity, which is convenient for users to use DIY 4. CB1, cost-effective, can be a low-cost option for 3D printer users running Klipper CB1 with ordinary motherboards 5. Efficiently run Linux system, support Debian, programmable CB1 core board: Model: CB1 motherboard CPU: Allwinner H616, quad-core -A53 @1.5GHz GPU: Mali G31 MP2, support OpenGL3.2 RAM: 1GB DDR3L SDRAM BTB-transposon: same as for CM4 Size: about 55x40mm/2.16x1.57in Colour:black Material:PCB Package Contents: 1 x CB1 core board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.