1. Uses four-layer thick copper immersion gold PCB; chip built-in error detection circuit (thermal shutdown, over-current shutdown, and power-on reset) 2. Supports full step, half step, quarter, 1/8, 1/16, 1/32 step operation 3. Maximum input voltage: 50V; maximum output current: 4A (requires proper heat dissipation) 4. Equipped with a large heat sink for improved thermal performance 5. High-efficiency motor current control with advanced dynamic mixed decay technology for precise current tracking and efficient motor control at high speeds refer to the TB67S109 chip datasheet for details Specifications: - Model: TB67S109 - Pin header: Unsoldered - Product type: Driver module - Power supply voltage: 950V - Output current: Up to 4A - Material: PCB - Color: As shown in image Package includes: 1 x Motor driver module 2 x Pin headers Note: Other items not included. Lighting and display differences may cause slight color variation between image and actual product. Measurement tolerance: 13 cm. Warnings: - This product is static-sensitive. Handle with care. Remove packaging before use. - Install the heat sink properly and ensure adequate cooling during operation. Do not operate for extended periods without cooling. - Verify correct orientation before installing the module into the motherboard. Incorrect installation may cause damage to the module or motherboard. - Always power off the system before inserting or removing the module. Do not hot-swap. - The module may become hot during operation. Avoid direct contact to prevent injury. - When installing the heat sink, ensure it does not touch module pins or any conductive parts. - Do not exceed the motors rated current. Overcurrent may lead to excessive heating or damage to the motor and driver.