Power-up test sequence/start-up mode, Tutorial mode, Reset to factory settings – Beltronics V960/V940 User Manual
Page 5: Drk (bright/dim/dark) button, Aud (auto-mute/volume control) button, Cty (city/highway) button selectable features, Entering selectable features mode installation, Interpretation of alerts, Radar alerts, Instant-on/pulsed radar alert
