Fangrui Product Details Features:1. Use High-quality Materials, 2. Exquisite Appearance 3. Convenient To Use 4. Stable Performance 5. Wide Application Range Parameters: Name: Dc-dc Adjustable Step-down Module Input: 12-75v Output: 2.5-50v Adjustable Current: 25a (max) Efficiency: Maximum (the Smaller The Pressure Difference, The Higher The Efficiency) Wiring: For High-power Situations, The Wiring Should Be As Thick As Possible. Voltage Conversion Overview: 12-75v To 5v 12-75v To 9v 14-75v To 12v 17-75v To 14.8v 19-75v To 16.8v 22-75v To 1 9v 24-75v To 21v 28-75v To 24v 35-75v To 30v 41-75v To 36v 48-75v To 42v 55-75v To 48v In+: Input Positive Electrode Vadj: Output Voltage Regulation 0ut+: Output Positive Electrode In -: Input Negative Electrode Clockwise Large Counterclockwise Small Out -: Output Negative Electrode Attention: To Charge The Battery And Battery, Please Add A Diode To The Output To Prevent Backflow! Material: Abs Colour: As Shown Package Contents: 1 X Dc Adjustable Buck Module Only The Above Package Cont