Experience the thrill of the race with the Joysway Superior 551 USB Power Slot Car Racing Set, a groundbreaking addition to the slot car toys industry. This innovative set is powered by a USB system, allowing for endless hours of racing fun without the need for traditional batteries or transformers. Simply connect your own power bank or smartphone USB adapter, and you're ready to race. With over 21 feet of mega track, digital proportional speed controllers, and highly detailed scale cars, this set brings the excitement of slot car racing into the modern age. The Joysway Superior 551 USB Power Slot Car Racing Set features: - A USB power system for convenient and safe play, just plug in your own power bank or smartphone USB adapter. - Digital display electronic lap counter & Powerbase integrated as combo track, with PRACTICE and RACE modes to either hone your skills or challenge a friend. - Digital proportional speed controllers for high-resolution speed control, ensuring a smooth and realistic racing experience. - Highly detailed 1:43 scale cars with bright LED headlights and a strong magnetic base, designed for quiet and smooth operation. - Mega tracks that are wider and longer than traditional slot racing tracks, providing more space for competitive racing. What's Included: - KING yellow sport car x 1, ACE purple sport car x 1, Digital proportional speed controller x 2, Digital Display Lap counter & Powerbase combo track x 1, USB power cable x 1, and more for a complete racing setup. Prepare for unparalleled racing excitement with the Joysway Superior 551, where technology and tradition meet to deliver high-speed action and fun for racers of all ages.