Package include: 1 Piece fan include mounting screws & nuts Dimensions: 25mm(L) x 25mm(W) x 10mm(H) / 0.98'' x0.98''x0.39''(L*W*H) Rated Voltage: DC 5V; Rated Current: 0.15Amp; Rated Speed: 8500 RPM; Air flow: 1.82CFM; Noise:22.5dBA Bearing Type: Sleeve Bearing ; Life: working up to 35000h at 25 degrees. Connector: Ph2.0 2Pin; Lead wire:UL Type (+): Red wire ; (-): Black wire. This is a two wire cooling fan.