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