Item Weight: 1.76 ounces Product Dimensions: 3.94 x 1.97 x 1.18 inches Compatible with Ninebot Gokart Kit (with Ninebot S MAX), Ninebot Gokart PRO, and Ninebot Gokart Lamborghini. This accessory adds a sporty finish, enhancing the sense of speed and performance. The stopwatch connects easily to the Segway Gokart. Follow the included instructions for setup. Connection may fail if the Segway Gokart software is outdated. In addition to displaying vehicle speed, it integrates driving mode control. Once powered on and connected, switch modes by pressing the button. Mode changes can only be made when the vehicle is stationary. Package List: Stopwatch Assembly x 1 piece Note: For any questions, contact customer support for assistance.