The super metal can carry from 4 GB to 128 GB of data is a 2 in 1 device because the USB flash drive is used to transfer and copy the digital data. It has 3.0 USB interface which enables speedy transmission of data, this USB flash drive is dustproof, waterproof, shockproof, and is universally compatible with various devices and the keychain is used to assemble keys which can loose away when it is not fixed inside the keychain.