Compact USB 5V speed controller for fans pumps and LEDs Why you need it - Plugs into any USB port to regulate DC5V devices with an adjustable voltage regulator - Provides precise control for choosing quiet operation or higher performance - Small and portable so it fits in tight spaces and DIY builds - MayAIYIN brand delivers reliable quality and dependable speed control What it does - Controls the speed of DC5V fans and pumps with adjustable voltage - Also suitable for LED lighting applications, meeting multiple project needs - USB powered, no external power adapter required - Voltage adjustable regulator function for convenient and precise control Key attributes - Function: USB based governor for fan and pump speed regulation - Compatibility: DC5V fans pumps and LED lights - Size: Small form factor for easy integration - Performance: Precise voltage regulation for smooth speed adjustment - Brand: MAYAIYIN ensures consistent quality and performance Use scenarios - PC builds: tune case fan speeds for quiet operation or boost airflow during heavy workloads - Small DIY cooling projects: regulate a 5V pump in compact cooling or circulation setups - LED lighting projects: adjust brightness or color intensity by voltage control This device keeps your 5V devices running at the exact speed you need with a simple USB connection, offering reliable, precise, and easy control.