The Super 251 1:43 USB Power Slot Car Racing Set comes with two cars and is over 13' of the track. Digital proportional speed controller enables the user to control the speed of the racing cars at will while most other slot cars only have 2 or 4 fi x ed speeds. USB power system, the first and innovative application in the slot car toys industry. Players only need to plug in their power bank or smartphone USB power adapter to play. High-scale cars with bright LED headlights and a strong magnetic base, cars run smoothly and quietly because of high precision gear design and installation. Mechanical lap counter and Powerbase integrated as combo track. Mega tracks, wider and longer tracks compare to traditional 1/43 scale slot racing tracks. Distance between cars is wider.

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