DC12V 3A 4-Wire PWM Fan Governor Speed Control with Temperature Speed Display

PWM frequency: 25KHZ (± 1KHZ). PWM signal amplitude: 5V (no-load). Support low-temperature shutdown of fans within 3A, and support reverse timing fans. Fan current: not exceeding 3.5A. Circuit self consumption: less than 40mA (test value at 12V, for reference only).

eBay