Fugetek 12V DC Brushless Blower Cooling Fan, HT-07530D12, 75x75x30mm, 2pin, Dual Ball Bearing, Computer Fan, Multi Use, Black, US Support This fan is made of special and premium materials for the Fugetek FG-637, 647 and FG-857 projectors. It is high temperature resistant and extremely durable. Dual Ball bearing. Genuine NSK or NMB balls made in Japan. Guaranteed to continuously run 50,000 hours under normal temperature. Speed: 3500 RPM Rated Voltage: 12 V; Noise Level : 42 dba Dimensions:: 75x75x30mm; 2.95x2.95x1.18" Lead wire:UL Type (+):Red (-):Black. This is a two wire blower.