4.5 Inch Two Wheels Kids Smart Electric Self Balancing Scooter Key Features : Special safe board to protect battery from over charge or over discharge;Flexible direction of rotation, built-in advanced gyroscope;Two separately wheels can work independently of each other. Each wheels has its own motor and gyroscope system to realize;Fashionable and Ergonomics design, various colors for you to choose;Anti-vibration, anti-explosion, anti-skip tire;Mainboard:Fourth generation intelligent control board ;It is easy for you to turn a corner , change speed and brake and so on;Security protection: tilting protection, speed limit protection, low battery protection ;High efficiency, low consumption, safe, convenient and no pollution;A revolutionary green product for personal transportation that can be easily carried around on bus or subway . Shop at http://www.onu-mall.com/4-5-inch-two-wheels-kids-smart-electric-self-balancing-scooter-yellow