Upgrade Meditation Headband: Boost your brain power with real-time brain wave data, concentration, relaxation, and fatigue detection. Also measures heart flow, forehead temperature, and heart rate variability HRV. Built-in Gravity Sensor: Easily control head movements with real-time identification to help with focus and diversified interactive experiences. Emotion Perception Light: Visually see the state of your brain with the corresponding color light when attention, relaxation, and brain flow reach high values. Multiple Application Support: More than 20 Apps, Free update&download on Apple app store and Google pay.Visualize brainwave on APPs.Scientifically track and evaluate the result of meditation. Wide Use: The latest and most accurate professional brain trainer suitable for stress management, deep meditation, focus consistency, mental strength, calm, and impulse control. Ultra-light and portable for use by children, yoga practitioners and beyond.