HW-585 3 Channel DC 12V PWM Speed Temperature Controller 4 Wire Computer Fan Thermostat Governor Module Board for PC Computer. Working voltage: DC12V. Circuit load capacity: Each channel supports less than 4A, and the bus current is not more than 9A. Output range: The first channel 20%-100 or 40%-100, the second channel and the third channel 10%-100. Temperature probe: 50K B=3950. Temperature control temperature zone error: According to the temperature probe error, generally 3-5%. Stop alarm speed threshold: 700-800 rpm. Product size: 50*43*13mm. Product weight: 19g. Package includes: 1 X Fan Thermostat, 1 X Four-wire Cooling.