These BCI headphones use brainwave sensors to measure your focus
Neurosky Mindwave Mobile 2 Bluetooth Brainwave Ideation Headset Brainwave Starter Kit - Instrument Parts & Accessories - AliExpress
NeuroSky MindWave Mobile 2 EEG Headset - MindTecStore
New Brainlink Pro Brainwave Eeg Headband For Neuro-feedback Mind Control Smart Headset With Heart Rate Sensor Emotion Detection - Smart Activity Trackers - AliExpress
Neurosky Mindwave Mobile 2 EEG Headset Brainwave Starter Kit Mind Control Brainlink Device Support SDK for Secondary Development _ - AliExpress Mobile
Man sitting on neurological chair with brainwave scanning headset, researcher doctor tracking evolution of patient's brain using tablet, adjusting eeg device. Scientist examining nervous system Stock Photo - Alamy