Features: Experience optimal cooling with our 12cm adjustable speed fan, featuring adual ball bearing and a powerful 3000 RPM for efficient heat dissipation in electronic devices. This fan operates on input of AC100 240V 50/60Hz and outputs 12V2A, making it for various applications including computer cases, graphics cards, and routers. for enthusiasts and professionals seeking cooling solutions for their electronic equipment. for use in computer mainframes, server cabinets, and even for ventilation purposes like smokes extraction. Choose from 1 to 4 fan to customize your cooling needs and ensures devices remain at performances levels. Specifications: Material: Plastic Input: AC100-240V 50/60hz Output: 12V2A Single fan: 12x12x2.5cm Styles: 1 Fan, 2 Fan, 3 Fan, 4 Fan(optional) Note: Please allow 1-3cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1Set 12cm Cooling Fan