Brand: TaiwanSpecification: 40*40 * 20MMModel: CHA4012EB-MAH-O(RE)Voltage: 12VCurrent: 0.24ABearing: Double ball bearingSpeed: 3000-7600rpm (MAX) noise is relatively loud at full speed, very silent at low speedAir volume: 3.5-8.54cfm (MAX)Noise: 16-35DBAWire Length: about 10cm with terminalAdditional function: supports pwm function. (connect to 3p fan to full speed)