UTRA USB Flash Drives allows use morse code or APP to unlock. For morse code, set a morse code via app first, then you can click the UTRA with morse code to unlock.
Note: Needs lots of practice
For app unlock, use your social account or cell phone to create an account, then if UTRA and app has bluetooth connection, UTRA unlock automatic, if UTRA and app has not bluetooth connection(you disable bluetooth or you phone far away from UTRA), the app will remind you not to forget the flash disk and UTRA will lock when the setting time coming.
This uses logic gets a perfect balance between usability and data security. Don't need to input an annoying password every time.
Warning: UTRA is not a Encrypted Flash Drives, anyone can access the data by disassemble UTRA.