Features Support a Variety of Screens: This is a 3D printer main control board, onboard ESP32 wifi, support Marlin2.0 firmware, in addition to ordinary LCD2004, 12864 screen, but also support MKS MINI12864V3, and MKSTFT serial screen. 32 Bit Microprocessor: 3D printer control motherboard built-in ESP32 DOWD V3 chip for Xtensa dual-core 32-bit LX6 microprocessor, supporting clock frequencies up to 240MHz. Powerful: 32 Bit control motherboard with ESP32 WROOM 32U module, embedded dual-core 32-bit high-speed MCU, clock up to 240MHz, and integrated WIFI, Bluetooth module, update the firmware via USB, you can connect WIFI and web control printing. 8M Byte Chip: In addition, the printer motherboard module also has a built-in 8M byte Flash memory chip, for more application scenarios to provide effective protection. Back EMF Protection: VEXP for stepper motors generated back EMF protection circuitry designed to greatly reduce the damage to the motor driver. Specification: Item Type: ESP32 3D Printer Motherboard MCU: ESP32 WROOM 32U MCU Frequency: 240MHz Flash: 8192K RAM: 520Kb Power Input: 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 Axes drive, 6 motor interfaces (double Z axes parallel output) Drive Mode: STEP or DIR standard mode Drive Signal: Pin out the signal, support external Subdivision Settings: DIP switch to set subdivision LCD Interface: Support ordinary LCD2004, 12864; support for MKS MINI12864V3 Serial Port: Reserved serial port 2, support for MKSTFT series serial port screen Limit: X, YZ, MT DET 3D TOUCH: Support Power Protection: Non reverse polarity protection and power spike 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 meter) Note: MOS drive circuit, limit input, and temperature measurement circuit add Schottky diode protection to reduce damage to IO from external spikes. Package List 1 x ESP32 3D Printer Motherboard 1 x USB Cable A C Type C(1 meter)