【DIY Vertical Window Fan】 Can both vertical and horizontal, provide efficient cooling and ventilation. Mining rigs rely on the cooling power of fans for optimal operation. Maximize Airflow with 4x 120mm Fans, Powered fans are very versatile and consume less energy, great for Cabinets, Servers, Chassis, Plant/ Mushroom Growing , Ice Fishing Shack , Chicken Coop, Generator Box and more. 【Variable Speed Control】 110V - 220V Fan power supply with speed control function, turn the knob to adjust the speed, 3V - 12V adjustable fan speed，and can turn off the fan . | Input: 100V - 240V 50/60Hz | Output: DC 3-12V 200-2000ma 【Easy to Install】Features a durable plastic construction and easy installation process, making the High airflow fan highly DIY-able for users of all levels. Designed with exhaust and intake options, allowing for effective ventilation and cooling in both hot and airless spaces. With its adaptable design and sturdy construction, this fan not only ensures optimal ventilation but also offers a practical and efficient way to keep your environment cool and comfortable. 【Dual-Ball Bearings 】Have a lifespan of 50,000 hours and allows the fans to be laid flat or stand upright. The fan includes an AC speed controller with power switch to set the fan's speed to optimal noise and airflow levels for various environments. 【Ventilation Fan】120x120x25mm / 4.72in(L) x 4.72in(W) x 1in(H) in per fan. Total Size:480 x 120 x 25 mm ( 18.88 x 4.72 x 1 in. )| Rated Voltage :12V | Speed: 2800 RPMx4.