The Airwheel smart suitcase is a reliable companion that will help you wherever you travel. It is lightweight and can be easily switch between ride-on mode and pull-behind us The rechargeable battery allows for easy packing and satisfies airline carry-on requirements. Fits perfectly in most overhead luggage bins.(according to the regulations of each airline) On the outside of your suitcase, the dual high-speed USB output port is perfect for charging mobile phones and tablets simultaneously during your trip. The TSA custom combination lock provides the highest security for your luggage. The high-quality solid tires are wear-resistant, puncture-resistant and have excellent grip performance, whether it is a flat street, a slope, a rugged path, you can walk as you like.