Features: brand new and high quality Tmc2226 has all the functions of tmc2209 and can completely replace tmc2209. Tmc2226 is HTSSOP, which has better heat dissipation performance under the same current, it generates lower heat Supports larger current, and supports infinite position return to zero function. Large heat sink, good heat dissipation. Super silent. Set the UART mode by setting the jumper cap instead of soldering on mks sgen_l, mks genl, mks robin e3 d, for mks robin V3 to support uart mode. Specifications: Item: TMC2226 Stepper Motor Driver Size:approx 12x21mm/0.47x0.83in Material:PCB-board Used for: 3D Printer Accessaries Package Includes: MKS TMC2226 + Heatsink Quantity: 1 Set / 4 Sets (Optional) Drive current adjustment 1. Verf measures Gnd and the voltage at the middle end of the potentiometer. 2. When measuring voltage, be sure not to connect the motor, otherwise it is easy to burn the drive. 3. When measuring the voltage, the power should be turned on, don'for t just connect the USB power supply. 4. Please pay special attention to the direction and do not insert it backwards. Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 Set x Motor Driver ( MKS TMC2226 + Heatsink)