he B-Alert X4 wire headset features a compact form factor to maximize ease-of-use and comfort in real-world environments. The mid-line sites deliver real-time, second-by-second B-Alert Cognitive State Metrics1 of high and low engagement, confusion/fatigue, and sleep onset. The on-board SD card enables extended recordings for field applications, including sleep deprivation and ergonomic studies. For first-time and experienced EEG users alike, B-Alert X4 is a practical solution for quickly implementing psychophysiological assessment.