Coolerguys Thermal Fan Controller (Rev. 4) Requires Supply Voltage: 12V & 5V DC, will only output 12v, not compatible with any 5v lite kit Turn on temperature ~87F (30C) / Turn off ~80F (27C) Can natively control 4 fans Maximum power draw to not exceed 1800ma (1.8A) 3 year replacement warranty when purchased from Coolerguys