Features: 1. Using high quality materials, product quality is guaranteed. 2. Chip built-in error detection circuit (thermal shutdown (TSD), over-current shutdown (ISD), and power-on reset (POR)) 4. Compact and lightweight size, beautiful component layout   Parameter: Allow full step, half step, quarter step, 1/8, 1/16, 1/32 step operation Maximum input voltage: 50V Maximum output current: 4A (requires good heat dissipation) The product adopts four layers of thick copper immersion gold PCB Attention: 1. The product is sensitive to static electricity, please handle with care when using, and it is best to remove the packaging when using it 2. Please carefully confirm the installation direction before inserting the module into the motherboard, it may be directly damaged when inserted improperly, and may even damage the motherboard 4. The module will be very hot during operation, avoid touching it during operation to avoid burns.