Product Description Thermaltake Esports Challenger Pro USB Keyboard Red Illumination Back Light Interface USB Operating System Windows 7 / Vista / XP Macro Keys 10 Multimedia Keys 6 USB Port USB 2.0 x 2 Switch Lifecycle 10 Millions Cable Length 2m Body Dimension (LxWxH): 505 x 195 x 27mm Fan Speed 6,000 RPM(±15%) Max. Airflow 2.7CFM Noise Level 21.7dB Rate Voltage DC 5.0V MTBF 50,000 Hours Fan Dimension (LxWxH): 30 x 30 x 10mm