PWM Fan Temperature Thermostat Speed Controller for LED/Peltier

Includes temperature probe • Ideal for Peltier Cooler Fans & LED heatsink fans Automatically control 4-pin, 3-pin, or 2-pin computer fan speed. As target temperature raises, this controller will speed up the fan. As temperature reduces, the fan will slow down. Without the temperature probe attached, the module can be used in manual mode by using the onboard button to toggle fan speed. The 4-pin model should be used with fans that have a separate wire for speed control. Those are typically 4 wire fans, but could also be a 3 wire fan if it doesn't have a tachometer output. The 3-pin model should be used with fans that do not have a speed control input. Those are commonly 2 wire fans (you can plug it into this module even though it has three leads, the third is a dummy for the tachometer output). The tach wire on fans is usually, but not always, yellow. The modules do not use  Use the included temperature probe to program fan speed based on your heatsink temperature, or use in man