Featuring Powerful cooling delivered by four fansOptimized vent mesh for an excellent heat dissipationAdjustable stand angle2-port USB hubRED LIGHT Tech specs Compatible notebook: up to 15″Dimensions: 390 x 280 x 28mmFan size:70 x 70 x 15mm(2pcs)125 x 125 x 15mm(2pcs)Air flow: 65CFMSmall fan speed: 2500 ± 10% RPMBig fan speed: 1000 ± 10% RPMRated voltage: 5V DCCable length: 60cm