Specifications Model R9-NBC-A2HK-GP Color Black Materials Aluminum, Plastic Weight 0.69 kg / 1.5 lbs Dimension (W / H / D) 367 x 262 x 24.5~60mm 14.4 x 10.3 x 0.9~2.4 inch Fan Dimension (W / H / D) 140 x 140 x 15 mm * 2 (5.5 x 5.5 x 0.6 in) Fan Speed 700~1200 RPM±15% Fan Speed Adjustment Yes Fan Airflow 92 CFM Fan Noise Level (dB-A) 20~28 dBA Power USB 5V DC USB USB 2.0/1.1*2 + mini USB*1 Compatibility Supports up to 16” laptops