Features: brand new and high quality TMC2209 provides a load and loss of speed detection technology. The motor driver provides a current dynamic regulation technology that saves up to 75% of electrical energy. The motor mode operated more smoothly and avoid losing steps and jittering. TMC2209 adopts stealthChop2 ultra-quiet technology. TMC2209 run much cooler due to a large-area cooling fan,it can lower the temperature when drive is working. Specifications: Material:Metal Size:20.32x15.24mm/0.8x0.6in for Peak Current:2.8A Voltage Range:4.75V-28V for DC Interface:Step/Dir Package Includes: 1x TMC2209 V1.2 Stepper Motor Driver 1x Wire note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.