1. The chassis is made of high-strength aluminum alloy with strong stability. 2. High efficiency 550 strong magnetic motor, fast. 3. Zinc alloy gears, strong wear resistance. 4. Using hardware oil pressure shock absorbers. Package included: 1*rc car 1*controller 1*rechargeable battery(built-in) 1*charger basic information brand:wltoys model:144001 speed:60km/h power system esc:brush motor:brush 550 transmitter frequency:2. 4g battery: 4xaa battery(not included) battery: 7. 4v 1500mah others charge time:3h using time:7min control distance:100m function:forward,backward,left,right proportional control:proportional control dimension size:31*20. 5*11cm package size:41. 5*23*15cm weight:1800g (wl144001)