31EnglishManagementAudioECO Mode Choose "On" to dim the projector lamp which will lower powerconsumption, extend the lamp life and reduce noise. Choose "Off"to return normal mode.High Altitude Choose "On" to turn on High Altitude mode. Operate the fans atfull speed continuously to allow for proper high altitude cooling ofthe projector.Turn Off Mode • Instant Off: Shuts down the projector without fan cooling.• Instant Resume: Resumes the system when the Power buttonis pressed again within 2 minutes.Auto Shutdown The projector will automatically shutdown when there is no signalinput after the allocated time. (default is 120 minutes)Lamp Hour Elapse Displays the lamp’s elapsed operating time (in hours).Lamp Reminding Activate this function to display a reminder to change the lamp 30hours before its expected end-of-life.Lamp Hour Reset Press the button and choose "Yes" to turn the lamp hourcounter to 0 hours.Volume • Press to decrease the volume.• Press to increase the volume.