Automatic following: Equipped with UWB high-accuracy location technology, with opening of the smart band,the suitcase will follow you. 20 inch Standard suitcase for airplane: International standard suitcase for airplane, can be on board directly, no need checking. Fingerprint unlock: It takes only 2 seconds from the input to the opening of the case, which is more convenient without carrying a key, and can store 5 fingerprint information, enough for a family to use. anti-lost alarm: Luggage can recognize the distance to the owner.once the distance is out of security distance,the APP will alarm, and the band will also shake to alarm. Alarm distance: 3M Mode switch: One button to switch :auto-follow mode to tow mode.When using the normal tow mode ,the motor will draw up,protecting the motor and make it easy to tow the luggage External USB port: can charge your phone and table pc. The removable 62.6Wh lithium-ion battery complying with airline boarding requirements is able to charge your mobile phone, Pad and other electronics.