?Parameter? Voltage: DC 12V, Working Current: 0.08A, Motor Power: 0.96 W, Temperature of usage environment: -10? to +70?. When you use them, pls don't exceed this range!! 2. If the noise is too big and you want the fan to be muted, please connect a 47 ohm resistor in series with the circuit to adjust the voltage to 12 V 0.05 A. ? Application?Used for cooling on hot end - 3D Printers, DVR or other cooling needs. Air Volume: 5.75±10% CFM; Rotational speed: 5600±10% (r/min); Wind blade diameter: 36 mm. ?Variety Of Size?40mm Fan - Size: 40 mm x 40 mm x 10 mm (1.57 inch x 1.57 inch x 0.39 inch); Cable length: 280 mm (11.02 inch). Connector: 2.54-2P Connector. ? Durable?With high performance, long life and low noise. Noise: 26 dBA; Certification: CE,UL,CUL. ? Quality Assurance? The copper jacket of the our fan contains oil and has a lifespan of 30,000 hours. Besides, we prodive 12- month warranty.