Delinx 2-Pack Ultra-Mini 5V 12V 4-Pin PWM Fan Temperature Controller, DC Smart Fan Speed Regulator with NTC Thermistor, 343 Programmable Modes for PC Case, 3D Printer, Small Space Cooling

["✅ Ultra-Compact Design for Tight Spaces Measuring only 11mm x 17mm (about the size of a fingernail), this mini PWM fan controller is perfect for compact enclosures, small PC builds, 3D printers, Raspberry Pi projects, and other space-constrained cooling applications. No bulky modules, maximum installation flexibility.","✅ Smart PWM Temperature Control Fully compatible with 5V/12V standard 4-pin PWM fans (NOT for 2/3-wire fans). Features 343 customizable control modes, adjustable start temperature (35-65℃), start duty cycle (20-60%), and full-speed temperature difference (5-50℃) to match your specific cooling needs.","✅ Low Power Consumption & Reliable Performance Ultra-low standby power: only 10mW at 5V, 25mW at 12V, minimizing energy waste. Supports input voltage 5-15V, fan current up to 3A, with stable direct input-output transmission for long-lasting, reliable operation.","✅ Easy Setup & Configuration Simple button operation with LED indicator prompts for intuitive parameter setting. No complex software required—set your desired temperature thresholds, save the configuration, and the module will automatically adjust fan speed in real-time based on NTC 50K B=3950 temperature probe readings.","✅ Wide Application Scenarios Ideal for PC case/router cooling, 3D printer hotend/bed cooling, Raspberry Pi/DIY electronics cooling, small server racks, car audio systems, and any other 4-pin PWM fan cooling projects that require automatic temperature control."]