Powerhobby 35mm Ultra High Speed Motor / ESC Cooling Fan 35x35x10mm high speed fan with dual ball bearings. Features: Runs off both receiver (6v) and 2S battery (8.4v) voltages Perfect for 1/10, 1/8 and 1/5 scale Applications Specs : Fan Speed 21,000 RPM @8.4 Dimensions (LxWxH) 35x35x10mm Wire Length: 2" + 7 inch extension Operation Voltage 5V - 8.4V Current 0.45A JST Plug Includes : 1 fan with Hradware and extension wire.