This Transparent Robot Smart Car Chassis comes with a quality product. The kit is easy to assemble/disassemble. 

Note:
The motor power supply is 3V ~ 6V.  Rotating speed of the motor is 125RPM. All the parameter above is tested without load. The car Chassis is transparent, you need to tear out a protective paper. The color of a protective paper may be different.

Feature:

• Smart car chassis tracing car Robot car chassis with code disk, Ideal for DIY
• This car is the tachometer encoder
• With a 4 AA battery box (batteries not included)
• It can be used for distance measurement, velocity
• Can use with other devices to realize the function of tracing, obstacle avoidance, distance testing, speed testing
• Wireless remote control