2WD Motor Smart Robot Tracing Car Chassis Speed Encoder Kit 

Features

• Brand new and high quality.
• Mechanical structure is simple, it is easy to install.
• This car is the tachometer encoder.
• With a 4 AA battery box.
• Can be used for distance measurement, velocity.
• Can use with other devices to realize function of tracing, obstacle avoidance, distance testing, speed testing, wireless remote control.
• Gear Motor reduction radio: 1:48.
• Size: 22cm x 14.7cm, wheel size: 7cm x 7cm x 2.6cm.