Voltage: DC 6V Current: 120MA Reduction Rate: 48:1 RPM (With Tyre): 240 Tire Diameter: 66mm Car Speed(M/minute): 48 Motor Weight (g): 50 Noise: <65dB 4WD 4 Wheel Smart Car Chassis is an ideal electronic toy for both kids and adults. The most economical and newest 4WD 4 Wheel Smart Car Chassis Kit with a simple mechanical structure makes it easy to install and function well. Give therein to your imagination with it and have fun! Package Included: 2 x Double-deck Car chassis 4 x Dual shaft DC Motor 4 x 69mm Rubber BO wheels 2 x Screws, nuts, pillars 4 x Speed encoder 8 x Motor holder 1 x Caster 1 x 4 cell Battery case Connection Wires (red and black)