Executive Notebook Cooler Pad with 3 Built-in 60mm Fans (Gray) Executive Notebook Cooler Pad with 3 built-in Fans (Dark Gray) General Features: Dark Gray color Powered by USB bus Three (3) built-in 60 mm fans 30 CFMAir Flow 2200 RPM ~ 3000 RPM Speed 21 dBA Noi 0.26A ~ 0.45ACurrent DC 3.5V ~ DC 6VVoltage 1.3W ~ 2.25WPower Regulatory Approvals: CE