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🛒 12v Four Wire Temp Temperature Control Switch Module Board Pwm Fan Speed Regulator Controller Ntc 3950 Thermistor Thermostat(china) to grab big discount you can buy 2 piece 12v Four Wire Temp Temperature Control Switch Module Board Pwm Fan Speed Regulator Controller Ntc 3950 Thermistor Thermostat(china) then you get 38% OFF