Netac U618 16GB USB 2.0 Flash Drive with Hardware Encryption Keyboard Lock for Data Security Independent Keypad input,leaving no trace in the computer 2 Partitions on 1 Drive:One is public partition(4GB),everyone can read and write in public partition. The other is security partition(The rest),This partition will not display in the computer before unlocked Date protection in advance:AES 256-bit Hardware Encryption,No possibility of physical force cracking,security has achieved military level standard Built-in Lithium battery,realize off-line encryption without connecting to the computer Anti-Hack Function,No need to worry about your data being stolen