Specification AirFlowCapacity : 36 cubic_feet_per_minute BatteriesRequired : 1 Brand : QINIZX BulletPoint1 : 1. PWM speed controller adopts PWM control technology to realize temperature control and speed regulation. The fan speed can be controlled according to the ambient temperature. When the ambient temperature is lower than the set starting temperature, the governor controls the fan to stop running. BulletPoint2 : 2. Fan speed controller, small size, high performance, saving operation space. Fan Temperature Controller small size: 2.20x1.38x0.79inch (LxWxH), M3 mounting hole. Can control various 12V/24V DC 2-wire/3-wire/4-wire fans or motors. Maximum drive current 4A. [3-wire/4-wire fans only need to connect the fan's power cord to the controller] BulletPoint3 : 3. Dual working mode optional, fixed temperature mode or adjustable temperature mode. Fixed mode: The starting temperature of the governor becomes 30℃ (86°F), 30 to 50 degrees fan speed linear increase, 50°C(122°F) above the fan at full speed; Adjustable mode: Start-up temperature range: 10-50°C, full speed range of 30-70°C (Full-speed temperature=Start temperature +20°C). BulletPoint4 : 4. Fan speed control module is equipped with a high-precision temperature sensor with a cable length of 30cm/11.8inch and comes with a mounting buckle. It can be used to measure the temperature of air, liquid and solid surface. The temperature measurement range is -20~110℃. The temperature measurement accuracy is ±1℃. BulletPoint5 : 5. Notice: The voltage of the DC power supply used must be the same as the voltage of the fan, and the current of the power supply must be greater than the total current of the fan. The speed governor has a hysteresis circuit. The start temperature and the stop temperature of the fan are set by the difference of 2°C. Color : Green CompatibleDevices : Desktop CompatibleDevices1 : Printer CompatibleDevices2 : Amplifier CompatibleDevices3 : Inverter CompatibleDevices4 : Refrigerator ConnectorGender : Female-to-Female ConnectorType : 4-pin Peripheral Connector CoolingMethod : Air CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier : 7437236545563 ExternallyAssignedProductIdentifier1 : 780861370282 ExternallyAssignedProductIdentifier2 : 0780861370282 IncludedComponents : PCBA+Sensor IndoorOutdoorUsage1 : outdoor IndoorOutdoorUsage2 : indoor ItemName : DC 12V 24V 4A 2-Way Adjustable PWM Fan Speed Controller, Automatic PC CPU Case Fan Temperature Control Governor with Sensor Universal for 2 3 4-Wire DC Fan ItemPackageDimensions_Height : 6.5024 centimeters ItemPackageDimensions_Length : 2.2098 centimeters ItemPackageDimensions_Width : 6.4008 centimeters ItemPackageQuantity : 1 ItemShape : Rectangle ItemTypeKeyword : desktop-computer-fans Manufacturer : QINIZX Material : FR4 MaximumCurrent : 4.46 amps MaximumRotationalSpeed : 3000 rpm ModelNumber : C-speed-12-24V-4A NoiseLevel : 50 decibels NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPins : 4 PartNumber : Speed-Controller-24V PowerConnectorType : 2-Pin ProductDescription : This speed governor uses PWM control technology to realize temperature control and speed regulation. The speed governor controls the fan speed according to the ambient temperature. The higher the temperature, the faster the speed. When the ambient temperature is lower than the set starting temperature, the governor controls the fan to stop running. Features: 1. Dual working mode (Fixed temperature range + Adjustable temperature), supports various DC24V/12V fan access. 2. With power supply reverse protection function, it can protect the controller and fan from damage when the negative pole is reversed. 3. Using industrial-grade solutions, excellent performance, maximum drive current 2A/4A. 4. Dynamic LED indicator, more intuitive and true understanding of the working status of the controller. 5. The devices are basically SMD packaging, with high craftsmanship, small size, and space saving. 6. The temperature sensor is equipped with connecting wires and mounting holes, which can detect the temperature of air and liquid. 7. Product size: 2.20x1.38x0.79inch (LxWxH), M3 mounting holes. Notice: 1.The voltage of the DC power supply used must be the same as the voltage of the fan, and the current of the power supply must be greater than the total current of the fan. 2. The speed governor has a hysteresis circuit. The start temperature and the stop temperature of the fan are set by the difference of 2°C. For example, the set start temperature is 30°C. When the temperature is lower than 28°C, the fan will stop. After the fan stops, wait for the temperature to rise. The fan will not start until 30 degrees or more. 3. When multiple fans need to be connected, connect them in parallel directly to the fan's wiring port, but ensure that the total current of the fans does not exceed the rated current of the governor. Package Included: 1x 4A Speed Controller with Sensor ProductSiteLaunchDate : 2021-07-09T12:58:46.140Z RecommendedUsesForProduct : connecting fans to computer motherboards for cooling purposes Size : 2.2 x 1.38 x 0.79 inches Style : DC12V-24V 4A SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 Voltage : 24 volts_of_direct_current Wattage : 48 watts