Item Type: Stepper Motor Driver Kit Material: PCB Maximum Current: 2.5A Input Voltage: 5.5V-28V UART Micro Step Setting: M0: Ground Package List 5 x Stepper Motor Driver 5 x Heat Sinks 1.Verf measures the GND and potentiometer voltage2. Do not connect the motor when measuring the voltage, otherwise it is easy to burn the drive3. When measuring the voltage, please connect the power supply, not only connect to the USB power supply 1GOOD PERFORMANCE: The stepper motor driver board is ultra quiet, with high current, 256 microstep subdivision, and good heat dissipation effect. 2UART MODE SUPPORT: The stepper motor driver supports UART mode and is used in conjunction with MKS SGENL without the need for jumpers. 3REPLACEMENT PART: TMC2209 has all the functions of TMC2208 and can completely replace TMC2208, supporting sensorless feedback function. 4HIGH CURRENT: With the characteristic of low heat generation, supports higher current, a maximum peak current of 2.5A and infinite return to zero. 5EASY OPERATION: Supporting the Uart module by wearing a jumper cap instead of soldering it onto the mks, with easy operation and good stability.