This Dualsky 40 size Tuning Combo contains the 3520C V2 820kv brushless motor and matching 65A Lite ESC. It's designed for use in .32-.45 size model planes and for 4S LiPO batteries. Using 13x6E to 15x6E propellers can yield flight times greater than 10 minutes. The motor comes with an X mount enabling it to be bolted to the firewall or on standoffs. Note that a battery connector for the ESC is not included.