Features 32-BIT MICROPROCESSOR: Built-in ESP32 DOWD V3 chip for Xtensa dual-core 32-bit LX6 microprocessor that supports clock frequency up to 240MHz. AGAINST EMK PROTECTION: VEXP has developed a protection circuit for the counter-EMK generated by the stepper motor, which significantly reduces damage to the motor driver. POWERFUL AND VERSATILE The motherboard uses the ESP32 WROOM 32U module, an embedded dual-core 32-bit high-speed MCU, the clock is up to 240MHz. And integrate WiFi, Bluetooth module, update the firmware via USB, you can connect WiFi and website to control the print. The performance is very strong. 8M byte chip: In addition, the module has a built-in 8M byte flash memory chip, which provides effective protection for other application scenarios. SUPPORT VARIOUS SCREENS: This is a main control board for 3D printer with built-in ESP32 Wi-Fi, supports Marlin2.0 firmware, in addition to the normal LCD2004 12864 screen, also supports MKS MINI12864V3 and MKSTFT serial screen. Specification: Item Type:ESP32 3D Printer Motherboard MCU: ESP32 WROOM 32U MCU Frequency: 240MHz Flash: 8192K. Memory: 520 KB. Power consumption: DC12-24V<20A. Heating head, hot bed: 2 heating heads, 1 hot bed. Temperature measurement: 3NTC100K: TH1, TB, TH2 (requires jumper selection) Controllable fans: 2-way controllable fans Motor interface: 5-axis drive, 6 motor interfaces (double Z axis parallel output) Driving mode: STEP or DIR standard mode. Drive signal: pinout of the signal, external support Subdivision settings: DIP switch to adjust subdivision LCD interface: support ordinary LCD2004, 12864; support MKS MINI12864V3 Serial port: reserved serial port 2, support for MKSTFT series serial port screen Limit: X, YZ, MT DET 3D touch: support. Current protection: reverse polarity protection and current peak protection. Firmware: For Marlin2.0.x Firmware update method: online download via USB Package list: 1 x ESP32 3D Printer Motherboard 1 x USB cable A C type C (1 metre). Small note: MOS driver circuit, limit input and temperature measurement circuit add Schottky diode protection to reduce damage to IO from external peaks. Package List 1 x ESP32 3D Printer Motherboard 1 x USB Cable A C Type C(1 meter)