The product is made of high-quality materials with guaranteed quality. The product features an ultra-small and compact design with a digital display. Supports four-wire fan speed regulation; product includes a probe cable. Supports low-temperature shutdown for fans up to 3A, allowing direct power cutoff for the fan, and supports reverse timing for fans. Offers stable performance and long service life. Parameters: Design power supply voltage: DC12V Voltage range: DC8-16V (circuit working voltage; please note the fan voltage range) Circuit self-consumption: less than 40mA (tested at 12V) Fan current: not exceeding 3.3A PWM range: 1-100 (signal percentage, not actual speed 0.5%) PWM frequency: 25KHz (±1KHz) PWM signal amplitude: 5V (no-load) Temperature measurement range: -9.9 to 99.9 Temperature measurement error: error within 0-50 range is less than 1.2, and error in other ranges is less than 2 Note: This speed controller supports only 4-wire PWM fans and does not support 2-wire or 3-wire fans. The included cylindrical probe is best suited for liquid and similar applications. If using a custom probe, ensure it has 10K resistance and a B value of 3950. Different production batches may have slight color variations or minor differences in the actual product, which do 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 variations between the product image and the actual item. Measurement error allowance is +/- 1-3cm.