Feature: 1. High Speed: Adopting 32 bit high speed chip, for STM32F407 microprocessor, with a main frequency of up to 168MHz and an FPU floating point arithmetic unit, it ensures strong data processing and faster speed 2. Optimized Heat Dissipation: The printer motherboard adopts 2 layer board with optimized heat dissipation processing, and adopts MOSFET tube to ensure better heat dissipation effect of the motherboard 3. Stable Power Chip: Using a dedicated power chip, support 12-24V power input, the hot bed current can be reduced to 1/4 under the same system power, effectively solving the heating problem of MOS tube in the hot bed 4. High Security: Equipped with overcurrent, overload, over temperature guard, and pre over temperature alert, the heating switch is automatically turned off to ensure the using security of the printer mainboard 5. Offline Upgrade Function: Support offline upgrade function, copy the upgrade file to the small memory card (not included), and then insert it into the 3D printer to complete the program upgrade 6. Stable Motor Running: The printer mainboard has built in A4988 motor drive chip, with low resonance, 256 microstep subdivision, to realize the stepper motor running without jitter or out of step Specification: Item Type: Printer Mainboard Size: Approx. 130 x 100mm / 5.1 x 3.9in Microprocessor: For STM32F407 Input Voltage: 8-35V Motor Driver: For A4988 Sensor Type: 100K Thermistor Firmware Update: Support small memory card, U disk (not included) Printing Method: Support offline printing, online printing Power off Resume: Yes Material Break Detection: Yes. Package List: 1 x Printer Mainboard