GDSTIME 4x120mm Powerful Computer Fans with AC Powered 100V 240V Variable Speed Controller DIY Cooling Ventilation Exhaust Projects for GPU Mining Rig Receiver TVs Network Rack Window Greenhouse Sheds

DIY Cooling Fan: Designed for projects that requires cooling, ventilation, exhausting and air circulation; Popular used in GPU mining rig, AV receiver, Stereo amplifier, TVs, Laser engraver, Servers, Network rack, Computer systems, Router, Laptop, Greenhouse or other small electronics ^^
Multiple Assembly Methods: Easy to DIY a long strip 1 x 4 array fan (480mm x 120mm ) or a 2 x 2 array fan (240mm x 240mm ); or separate use 2x240mm fan arrays directly (the farthest distance between the 2x240mm fan arrays is about 2.8 ft) ^^
Speed Adjustable: Features a knob variable speed controller to adjust the fans speed to optimal noise and airflow levels;
Input: 100V-240VAC; Just plug it into a wall outlet to start the fan; Dual-ball bearings rated at up to 50, 000 hrs;
Max Airflow: 464CFM (4x 116CFM);
Speed: 4x 3000RPM (max. ) ^^ Built to
Last: with metal fan guards on both sides and heavy-duty construction for Crawl Space, Basement, Attic, Garage, Hydroponics, Grow Tents; or as small window fan, easy to exhaust vent hot air, fumes and odors, promoting better ventilation and air circulation ^^
What You Get: 4x120mm fans, pre assembled in pairs; Mounting hardware, (all the screws and nuts needed, connecting tabs, brackets to connect all 4 together as one big unit, feet for the fans, rubber pads and sponge pad); AC variable power supply and a Y splitter for the power cable, so you can supply power to all 4 fans at once