Take full control of your play, with the app to your interactive toy engine. With the app for your Smart Tech Sound Engine, you can recreate your play world over and over again: Choose your favourite sounds for your Smart Tech Sound toys or even record your own sounds. And of course, you can fully remote control your engine with the app: Let your engine run at different speeds and change the headlights. The app requires permissions for Bluetooth and microphone. The app does not store any data: The microphone option is only used for recording the desired sounds.