12cm 12025 Fan for Computer 3000R Model: FS12025 Power supply: large 4PIN male and female interface, support multiple fans in series Voltage: DC 12V Current: 0.5A Speed: 3000RPM Air volume: 154.5CFM Noise: about 55dB-A [Because of the high rotational speed and noise, individual buyers should purchase with caution] Bearing: High precision double ball bearing Fan frame: one-shot injection molding, PBT+30% glass fiber VO flame retardant, high strength, high hardness Fan blade: one-time injection molding, PBT + 30% glass fiber + VO grade flame retardant. Industrial grade material, more durable Fan rotation direction: counterclockwise when viewed from the direction of the fan blades Operating temperature: -10 degrees Celsius to +70 degrees Celsius Storage temperature: -40 degrees Celsius to +70 degrees Celsius Power supply range: plus or minus 15% of rated power supply Insulation resistance: greater than 500 megohms Withstand voltage: sink leakage current 0.5mA 500V/1 minute Working life: 80,000 hours at ambient temperature of 25 degrees