Operate the train through an app: The engine comes with a free Bluetooth APP that lets you adjust the speed of the toy. Use a mobile phone to drive this clever little train forward, back or to a halt. Have full control over your train set and use the sound feature to play a selection of 5 different noises. Remote and button control toy: Buttons on top of the engine can also be used to control basic operations and play sounds. Great for kids who are too young to use an Apprechargeable electric train: The built-in battery can be charged using the enclosed charging cable. Your little ones will never have a dull day with this super cool interactive toy. Sustainable material: Made of high-quality materials that are ultra-strong and durable. A perfect addition: This remote-control train fits all Hape train sets. We recommend this toy for children of ages 3 and upwards.