Description Specifications Mfr Part Number: N9 Features: 180 mm high performance, high airflow volume fan  All-aluminum panel for efficient heat dissipation  Innovative airflow channels for improved and accelerated heat dissipation  6 adjustable usage angles offering more options for achieving user comfort.  4 USB ports allow users to conveniently work with external USB devices.  Adjustable fan speed to achieve balance between performance and quiet operations.  3 protective features for safe use at any angle.  Fan Dimension: 180X15mm    Bearing Type: Hydro Bearing  Rated Voltage: 5VDC  Operating Voltage:  4.5～5VDC  Started Voltage: 2.8VDC  Rated Current: 0.07±10%~0.13±10%A  Power Input:  0.35~0.65W  Fan Speed:  600±150~1000±10%RPM  Max. Air Flow:  81.56CFM  Noise: 16~20dB(A)  Overall Dimension: 380X279X34mm Net Weight: 1.7kg