Fangrui Product Details Overheating Protection, Overvoltage Protection, Stall Protection Supports Analog Signal Input Real-time Monitoring Of Motor And Drive Temperatures When Plugging In The Drive, Be Sure To Orient The Connector Correctly To Avoid Reversing The Polarity And Damaging The Drive. When Using High Voltage (greater Than 24v) Or High Current (greater Than 1.2a), Active Cooling Must Be Used To Prevent The Drive From Overheating. Supports High Subdivision: 256 Microsteps Supports Voltage: 4.5-36v Dc Supports Maximum Current: Irms=2.1a Ifs=3a Supports Sensorless Homing Low On-resistance: Rdson (h+l) = 230m Communication Modes: Spi Or Uart (spi By Default) Note: Due To Different Batches, The Appearance, Color And Printed Words Of The Product May Vary, Which Will Not Affect The Use. With Heat Sink Material: Pcb+metal Colour: Black Package Contents: 1 X Tmc2240 Stepper Motor Driver 1 X Heat Sink Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause Th