Features: 1. Excellent mute effect 2. Large heat sink, good heat dissipation 3. Support sensorless feedback function 4. Support Uart module by putting on jumper cap instead of soldering on mks gen_l V2.0, skr 1.3, 1.4.mks sgen_l Product settings: Default current 1.25A Maximum current: 2.5A Logic voltage: 3.3V/5V Input voltage: 5.5V-28V Microstep: up to 1, 256 Module: dir/step, uart Microstep settings: M0:GND:step 8 VCC_IO:step 32 GND:step 64 VCC_IO:step 16 M1: GND: step 8 GND: step 32 VCC_IO:step 64 VCC_IO:step 16 Operators use precautions: 1.Verf measures the voltage of GND and potentiometer 2. Please do not link the motor when measuring the voltage. Otherwise it is easy to burn the drive 3. Please connect the power supply when measuring voltage. Dont just connect to USB power