1、[High Performance] Equipped with for cortex m4 main control chip and a 168M main frequency microprocessor, this engraver offline control board supports storage card and USB storage, can be expanded with WiFi module, power off resume module, material shortage detection switch, and external card slot. 2、[3.5 Inch Touch Screen] The clear display and intuitive UI interface of this controller simplify the user operation process, providing easy access to the required functions. 3、[Fast Engraving Speed] Thanks to the high speed IO flipping and powerful timers of the main control module, the MKSDLC32 achieves a high engraving speed, which can achieve speed of up to 8000mm per minute. 4、[High Accuracy] The touch screen is highly compatible with the machine controller, delivering high precise printing operations and producing stable products. 5、[A4988 Stepper Motor Driver] The A4988 is a complete micro stepping motor driver with a built in converter, which can drive bipolar stepper motors in full step, half step, 1/4, 1/8, 1/16 step modes, with output driving capability of up to 35V and 2A.