1、STM32F042F6P6 MCU with internal oscillator, easy to debug SWD header(default is not filled) 2、Possess dual USB ports (vertical or horizontal), with split pin headers for USB connectors, I2C screen connections for 3in displays, jumpers on the back to select which pins (1 or 2) are power and grounded 3、For EN11 style click encoder, with buttons that support reset/terminate, there are 3 GPIO headers, 1 onboard for Neopixel, with data cable for expansion 4、The needles are classified similar to jump style and/or JST‑XH style, which can be used well for USB because of polarized 5、Adopt good quality PCB material, suitable for voron v0 3D printer/Raspberry Pi 3B 1 x Mini 12864 Display Item Type: Mini 12864 DisplayModel: For Voron v0Material: PCBApplicable Models: For Voron v0/Raspberry Pi 3B