Features: Low Noise action: Features advanced TMC2209 chip technology to significantly reduce motor sound, eliminating traditional stepper driver noise for quieter 3D printing environments. Ideal for users seeking improved offices comfort. Smooth Motion Control: Utilizes TMC2209 microstepping technology for consistent motor movement, enhancing output quality for detailed models and machine tool applications. Ensures consistent results for accuracy projects. Simple Setup: Straightforward design directly replaces A4988/TMC2208 units without complex installation, offering effortless upgrades for popular 3D printer mainboards. Saves time during printer modifications. Optimized Thermal Management: Integrated cooling structure maintains proper temperature levels during prolonged use, boosting component reliability for extended printing . Protects against overheating. Efficient Power Usage: Wide power input capability enables economical action with reduced energy consumption, making it suitable for race 3D printing jobs. Helps lower electricity costs. Specifications: Materials: PCB+ Electronic Component + Heat Sink Size: as picture show Quantity:1PC, 3Pcs, 5Pcs(optional) Package Includes: 1/3/5Pcs TMC2209 Stepper Motor Driver with Heat Sink note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.