1. The product is made of high-quality materials with guaranteed quality 2. The product features an ultra-small, compact design with a digital display 3. Supports four-wire fan speed control; product includes probe cable 4. Supports low-temperature fan shutdown up to 3A, allowing direct power cutoff for fans, and supports reverse timing for fans 5. Offers stable performance and long service life Parameters: Design power supply voltage: DC12V Voltage range: DC8-16V (circuit operating voltage; please note fan voltage requirements) Circuit self-consumption: less than 40mA (tested at 12V) Fan current: not exceeding 3.3A PWM range: 1-100 (signal percentage, not actual speed; minimum signal 0.5%) PWM frequency: 25KHz (1KHz) PWM signal amplitude: 5V (no-load) Temperature measurement range: -9.9 to 99.9C Temperature measurement accuracy: error within 050C is less than 1.2C; error in other ranges is less than 2C Notes: This speed controller is compatible only with 4-wire PWM fans; it does not support 2-wire or 3-wire fans. The included cylindrical probe is best suited for liquid temperature measurement. If using a custom probe, ensure it has 10K resistance and B value of 3950. Products from different batches may have slight color variations; this does not affect functionality. Material: PCB + electronic components Color: Black Package Contents: 1 x Module 1 x 3P input cable 1 x probe cable Note: Light reflection and differences in display screens may cause slight color differences between the image and the actual item. Measurement tolerance: 13 cm.