The Features screen is a central location for making adjustments to any or all of the adaptive features for Advance 22, Advance 21, and Advance 20 products. This may include: Directional Speech Detector, InVision Directionality, Active Feedback Intercept, PureWave Feedback Eliminator, Acoustic Signature, Acoustic Scene Analyzer, AudioScape, Comfort Control, Feature Sensitivity, and Self Check.