Small but fast,Easy to use 40MHz .The same frequency of cars will interfere with each Random pick color The car is powered by built-in rechargeable battery Recharge the car through the controller, easy and convenient! Charging cable is well integrated inside the controller, no more messy! Power (Car): Built-in rechargeable battery (included) Power (Controller): AA battery x 2 (not included) Power (Car): Built-in 1.2V 1/4AAA NI-HM rechargeable battery (included) Power (Controller):1.5V AA battery x 2 (not included) Car size: 1.2 x 0.9x 2.7" / 2.8 x 2 x 6.7cm Can size: Diameter2.5" / 6.5cm Height 4.75" / 12cm Package Included: 1 x RC Car 1 x Remote Control 1x Operating instruction 4 x Road Blocks Random pick color