Size: 30mm x 30mm x 10mm (length x width x thickness). Voltage: DC 24V.Material: plastic frame and blades. This 24V mini dc fan has quiet cooling performance. Speed: 10000 R/min. Air volume: 3.45 CFM. Noise: 31.6 dbA. This 3010 dc 24v silent mini brushless cooling fan is low-noise, low-vibration, reliable running. DC 24V powered with 2 pins connector easy to be connected with your computer motherboard or 3D printer power system. Allows your development boards or other experimental tools to quickly dissipate heat and will extend the working life. Ideal 24V brushless DC fan replacement for noisy or broken 24V 3cm DC fans in 3D printers, heatsink, humidifier, frequency converter, DVRs, NAS, switches, routers, other network and storage devices, etc.