• Boost up the motor cooling fan airflow up to ~40~50%, in turn, can lower the motor temperature obviously which is good for stock motor(10.5T~21.5T) racing
• Made of Aluminum casing with a better appearance
• Suit for most 1S or 2S Brushless Speed Control BEC output

Specifications:

• Max Voltage Input: 8V battery
• Dimension: ~24.2(L) x 13.2(W)x 6.2(H) mm
• Weight: ~4.5g