Features: Experience precise voltage control with the LM317 Adjustable Voltage Regulator board. Features digital voltage display for easy monitoring and accurate power management in your electronic projects. This regulator boasts double side circuit board and high frequency power supplement capacitors, ensuring stable performances and efficient heat dissipation with its integrated heat sink. For electronics engineers, DIY enthusiasts, and students, this module is perfect for those needing reliable voltage regulation in their projects. Widely applicable in laboratory power designing, electronic product development, and DIY electronic projects, it supports both AC3-20V and DC3-30V inputs with adjustable output ranging of 1.25V-28V. Specifications: Item: LM317 Adjustable Voltage Regulator board Supports AC3-20V and DC3-30V inputs Size：about 68MMx51MM/2.67x2in Load up to 2A Output 1.25V-28V Package Includes: 1PC LM317 Adjustable Voltage Regulator Board note: Due to the problems of lighting effects there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurement