Which of the following is a common device for deaf individuals?

Visual telephones are designed specifically for deaf individuals and provide a visual method of communication through video or text, allowing users to communicate in sign language or view gestures while talking. This is especially important in facilitating effective communication for those who rely on visual input rather than auditory cues.

In contrast, standard telephones and traditional voicemail systems do not cater to the needs of deaf individuals, as they primarily rely on audio communication. Amplified audio headsets may assist those with some hearing ability, but they do not serve the needs of individuals who are completely deaf, as these headsets still focus on enhancing sound rather than providing an alternative visual mode of communication.