Features: LV8729 driver module, 128 subdivisions, in order to meet customer need for high subdivision driver the research and development of ultra-quiet in-line driver module, the use methods is simpler, is the best choice for creating a quiet environment for 3D printer. Working voltage: 6V-36V, the recommended voltage is 12V The max current is 1.5A, the default is 0.8A Subdivision: 1, 1 or 2, 1 or 4, 1 or 8, 1 or 16, 1 or 32, 1 or 64, 1 or 128 A heat sink must be added to make the heat dissipation better (please be sure to use a large fan to assist heat dissipation). Notice: Please confirm the direction before power on, the reverse connection will damage the chip Specifications: Material:Metal Size: Approx.1.5mm x 2.0mm Max Drive Current: 1.8A (factory default 0.8A) Max Voltage: 36V (usually 12V) Support Subdivision: 1, 1 or 2, 1 or 4, 1 or 8, 1 or 16, 1 or 32, 1 or 64, 1 or 128 Product Process: four-layer PCB board Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 x LV8729 Module 1x Heat Sink