The 1225 fan is 120x120x25mm or 4.72x4.72x1inches; Rated Power: DC 5V 0.32Amp; Speed: 1250RPM; Air flow: 32CFM; Noise:22dBA; Connecter: USB
USB powered. it can run these right off the laptop without an external power source.No additional power supply required, no funky wiring, just plug it into the USB port and tuck the wires aside.
Computer fan designed for projects that requires cooling or ventilation; or as a replacement fan for various products
Ball bearing design ensures reliability and longer life
Replace a noisy or failed computer case fan, Install into a computer to increase air flow and cooling