Power buttonFocus ring1. Brief introduction of CB-100W1. Turning the projector On:Press power button 2 seconds2. Turning the projector Off:Press power button 2 seconds2. Screen focus/brightness1.Focusing of the screen:When an image appears on thescreen, check if it is in focus and fitsthe screen properly.To adjust the focus of the image,rotate the focus wheel.2.Brightness of screen: Setting-Brightness SettingReturnEnter-3-