Precise digital control for 5V USB fans Adjustable speed regulator with softstart technology to reduce inrush current and help extend motor life. Provides smooth, reliable speed control for 5V USB fans. Programmable timer for energy efficiency Autoshutdown from 0 to 999 minutes for convenient sleep routines and overall power savings. Doubletap display deactivation helps avoid unnecessary power draw when the unit is idle. LED dimming module for compatible lamps Seamless brightness adjustment for LED lamps that operate from 2.5V to 8.0V, with up to 5W load. Digital circuitry delivers stable voltage regulation for consistent illumination. Compact, versatile design Black housing measuring 72 mm x 25 mm x 15 mm. Accepts 4.0 V to 12.0 V input, making it suitable for a range of lowvoltage applications in industrial and commercial settings. Use scenarios 1) USB fan comfort and efficiency Attach to a 5V USB fan to dial in the exact airflow you need while protecting the motor and extending service life with softstart control. 2) Energyefficient display and shelf lighting Integrate with LED lighting on display cases or signage. Use the dimming and stable regulation to maintain consistent brightness while keeping power consumption in check. 3) Small lowvoltage motor or pump control Use in automation or hobby projects that require moderate voltage control and timed operation. The 4.0–12V input range supports a variety of compact motors and pumps.