Brushless: Hobby 2845 4200KV, 4 pole high-torque motor with metal heatsink and cooling fans design. Independent receiver and 45A ESC make this car more potential and upgradeable | Durable and Efficient Transmission: Metal gears and metal differential better distribute power to achieve a perfect 4WD, in which the 5.5MM diameter axle and M4 nuts contributed. The smooth effect of 16 ball bearings reduces power loss | Application of new materials: After many violent tests, the material developed for the honeycomb chassis is strong enough to withstand the impact of this monster truck. In addition, we also added F/R zinc metal reinforced sheet for impact resistance. As well as the adjustable pull rod of the same material as the chassis, with the 2.1kgf.cm in torque force 3-wire servo, it is sufficient for various terrains. It is worth mcentioning that we have improved the battery and equipped the casing with flame-retardant materials, which is more secure | Driving Quality: The tire (Pre-mounted sponge inserted) and oil-filled absorbers greatly reduce the shaking of the truck when driving at high speed. Calmly deal with all kinds of jumps and stick to the ground firmly | Excellent Performance: Ideal for big jump, popping wheelie and back flipping stunts, 2S 7.4V 1050 mAh 25C rechargeable LiPo battery and brushless motor bursts out at 27+ mph (45 kph) for adults (speed measured by GPS) | Perfectly Compatible: Independent smart 2S/3S 45A ESC support the 3S-capable power system, furious 42+ mph (68 kph) speeds achievable in optimum conditions using a 3S LiPo battery (3S 11.1V LiPo battery and more upgrade accessories available on Amazon) | Transmitter: 2.4GHz 3-Channel Radio with light bar control, 70% throttle limited switch great for beginners