The Ring also had the ability to render one who wore it effectively invisible.

The Ring also amplified the power of command, and allowed the Ring-bearer to impose his own will upon others. In addition, the ring granted the wearer increased hearing at the expense of the quality of their eyesight, and the ability to understand languages not known to the wearer.

The Ring could also perform other functions beyond mind control. It could amplify any inherent power its owner possessed. It also might have given the wielder the ability to read people's minds. Finally, the Ring had 'mastery over the powers of all the other Rings.'