1. Use Four-Layer Thick Copper Immersion Gold PCB; Chip Built-In Error Detection Circuit (Thermal Shutdown (TSd), Over-Current Shutdown (ISD), And Power-On Reset (POR)) 2. Allows Full Step, Half Step, Quarter, 1/8, 1/16, 1/32 Step Operation 3. Maximum Input Voltage: 50V; Maximum Output Current: 4A (Requires Good Heat Dissipation Conditions) 4. Equipped With An Extra Large Heat Sink, Which Allows The Module To Achieve Better Heat Dissipation. 5. High-Efficiency Motor Current Control (Advanced Dynamic Mixed Attenuation , Technology Can Track The Input Current More Closely Than The Traditional Mixed Attenuation Mode, Thereby Achieving Efficient Motor Control Under High Speed Conditions), See The Tb67s109 Chip Data Sheet For Details Description: 1. Specification: TB67S109 Unsoldered Pin Header 2. Product Type: Driver Module 3. Power Supply Voltage: 9-50V 4. Power Supply Current: 4A Notice: 1. The Product Is Sensitive To Static Electricity. Please Handle It With Care When Using It. It Is Best To Remove The Packaging Before Use. Please Be Sure To Install The Heat Sink Correctly And Air-Cool It During Use! Please Do Not Use It For A Long Time Without Cooling 2. Please Carefully Confirm The Installation Direction Before Inserting The Module Into The Motherboard. Improper Insertion May Cause Direct Damage, And May Even Damage The Motherboard. 3. Please Turn Off The Power When Inserting/Unplugging The Module. Please Do Not Insert The Driver Module When The Motherboard Is Powered On. 4. The Module Will Be Very Hot When Working. Avoid Touching It During Work To Avoid . 5. When Installing The Heat Sink, Please That The Heat Sink Does Not Come Into Contact With The Module Pins Or Any Other Conductive Location 6. Please Do Not Exceed The Rated Current Of Your Motor, Otherwise The Motor And Motor Driver Will Become Seriously Heated Or Even Damaged! Material: PCB colour: As shown Package Contents: 1 x Motor Driver Module 2 x Pin Header Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.