A London-based neurotechnology startup, 'NeuralLinker,' has unveiled a prototype for a non-invasive brain-computer interface (BCI) designed to enhance focus and learning retention in educational settings.

The device, which looks like a sleek pair of headphones, uses advanced EEG sensors and AI algorithms to provide real-time feedback to users on their cognitive state, helping them enter a 'flow state' for deep work. The company claims it can improve learning speed by up to 25%.

"We are not changing the brain; we are giving the brain a mirror," said the founder. "This is about self-optimization, not external control."

Ethics experts have called for strict regulation of the technology, particularly regarding data privacy and the potential for new forms of educational inequality.