Adjustable DC-DC voltage regulator with a manual tuning knob and LED indicator for brightness control of LED lighting. It supports 12V constant-current LED beads and 12V-24V constant-voltage LED beads. Automatic memory function stores and retains your settings even after power loss. Wide input voltage range and high current capability: accepts 12 to 24V DC input with a maximum current of 30 A, making it suitable for a variety of power supply applications. Key benefits and features - Precise brightness control: use the hand tuning knob to set the brightness of connected LED lights, with an LED indicator showing the adjustment. - Broad compatibility: works with both 12V constant-current LED modules and 12V-24V constant-voltage LED modules. - Reliable memory: automatically saves your last settings for easy recovery after power cycles. - Versatile power range: designed for DC input from 12 to 24 V and capable of handling up to 30 A for various setups. Use scenarios - Automotive and indoor LED lighting: adjust and maintain desired brightness for cabin, accent, or display LEDs powered from 12 V systems. - DIY LED projects: fine-tune and lock in the brightness of LED strips or modules in custom lighting installations or signages. - Small off-grid or vehicle power setups: regulate and stabilize LED power in solar-powered, RV, boat, or other 12-24 V power sources, where consistent brightness is needed.