1. 97 mm fan: The fan is made of PBT plastic, a material that is not easy to break or deform, and can operate stably between -10C and 75C. The 12 V 97 mm fan features a double ball bearing, which allows for long-term operation. The turbine lifespan is 67,000 hours at 25C. 2. Faster cooling: A centrifugal fan is used to quickly cool and ventilate solar panels/inverters/3D pressure cabinets/home multimedia cabinets; it can also be used as a replacement fan for inflatable decorations. By generating a powerful and concentrated airflow, the 140 mm fan is suitable for removing hot air from narrow areas. 3. Powerful: Compact yet capable, this small fan can provide a powerful airflow of 110 CFM at 6500 rpm (max.) and 53 dBA (max.) for applications with limited airflow, suitable for cooling electronic components and parts in confined spaces. 4. Plug and Play: The fan is easy to install. After installing the screw kit, simply plug it into the socket to start the fan. The power supply unit increases the maximum fan speed and enables the fan to be powered via an AC outlet. 5. Variable speed fan: Equipped with an adjustable speed controller with a 7.7-foot cable and power switch, allowing you to adjust the fan speed for optimal noise and airflow values; operates between 100 V - 240 V AC; enables the small fan to run via a 120 V outlet. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.