This is the MindWave Mobile 2 from NeuroSky, an EEG headset that safely measures and transfers the power spectrum (alpha waves, beta waves, etc.) data via Bluetooth Low Energy (BLE) or Bluetooth Classic to wirelessly communicate with your computer, iOS, Android device, or even Arduino! Simply slip this headset on to see your brainwaves change in real time! With the MindWave Mobile 2 you can monitor your levels of attention and relaxation — and even learn about how your brain responds to your favorite music. This headset is an excellent introduction to the world of brain-computer interface!