Embodiments of the invention generally relate to electronic devices capable of being implanted beneath the skin of a human user. The electronic devices include input devices for receiving input from a user, and output devices for output signals or information to a user. The electronic devices may optionally include one or more sensors, batteries, memory units, and processors. The electronic devices are protected by a protective packaging to reduce contact with bodily fluids and to mitigate physiological responses to the implanted devices.