<b>Stopwatch Assembly Compatible with Segway Ninebot Gokart Kit/Ninebot Gokart PRO. can display driving speed, bringing you a different passion and speed.</b><br><b>Stopwatch and Gokart pairing (see video for detailed steps):</b><br>Step 1: Make sure the Gokart is turned on.<br>Step 2: The Stopwatch does not have batteries, find two batteries to install in, and turn on the Stopwatch.<br>Step 3: Use a small screwdriver to press and hold the stopwatch reset button for 5 seconds (the white button next to the battery compartment, see the product display picture for the position of the white button), until the stopwatch<br> digital screen goes out and release, then you will hear a beep , The pairing is successful.<br>Bluetooth indicator<br> Flashing means that the vehicle is not connected; off means that the vehicle is connected.<br> Driving mode<br> ECO-safe mode / STRADA a novice mode<br> SPORT-sports mode/CORSA-track mode<br> Toggle key<br> Flick up or down to turn on; long press down to turn off;<br> Long press up to adjust the brightness of the display.<br> Battery indicator<br> Lights up to indicate that the battery is low and prompts to replace the battery.<br> The track mode is not supported when the balance car is used as the power of the kart.