The hottest version of the Surge Crusher is not recommended for those of a nervous disposition, with two 4000mAh LiPo packs (not included) performance is best described as truly awesome! Yes... we really do mean speeds in excess of 85km/h!! Servos: 1x 37g (Included) Radio System: 3 Channel (Inc.) Electric Motor: B3656 Water Cooled (Inc.)