Features: Rateds voltages: 5VDC, current: 0.18A; air volumes: 6.4CFM, speed: 5800PRM; Noise: 28DBA. Bearing type: Oil containing bearing; Connection cable: USB; Length: 93cm; Fan size: 40x40x10mm (length x width x height). Features: high airflows, low noise. Long lifespan, strong airflow, and stable performances. Function: for projects that require cooling or ventilation. This cooling fan for small spaces, can keep equipment cool and extend its service. Application: for heat dissipation of 3D printers, DVD players, computer cases, switches, and small communication devices; Cooling of PC CPU servers, replacement of fans for electronic products, etc. Specifications: Size: 40x40x10mm Color: Black Interface: USB Cable length: 93cm voltages: 5V Fan speed: 5800RPM Material: Plastic Package Includes: 1PC USB 5V 4010 Cooling Fan note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.