The Yeah Racing 30x30mm Aluminum Case Booster Fan has been updated with a full aluminum booster case, increasing the air flow directed into the fan. Plus, when mounted on a fan mount or ESC, the large surface area of the aluminum will act as a heatsink as well. Specifications: For: ESC / Heatsink / Motor Color: Black Mounting Holes: 30 x 30mm Bearing: Dual Ball Bearing Max Voltage: 8.4V Power: 1.40W Fan Speed: 14000 R.P.M (±20%) at 25℃, after 3 min. rotating. Current: 0.28A Wire Length: 255mm Connector: JST