2008 GMC Envoy Owner's Manual - Page 222

Before You Drive The RSE system is for rear seat passengers only and is not intended for the driver while driving. Each set of headphones has a volume knob. To adjust the volume, adjust this knob. The transmitters are located below the video display screen. The headphones shut off automatically if they lose the signal from the system after about four minutes to save battery power. The signal can be lost if the system is turned off or if the headphones are out of range of the transmitters. When using the wired headphones, if the front seat passengers play a CD in the Radio with Six-Disc CD (if equipped) or use XM™ Satellite Radio Service (if equipped), you will hear the audio for these sources, instead of the DVD or CD that is currently playing through the RSE. Notice: Do not store the headphones in heat or direct sunlight. This could damage the headphones and repairs will not be covered by your warranty. Storage in extreme cold can weaken the batteries. Keep the headphones stored in a cool, dry place. Both sets of rear seat headphones may include foam ear pads. The foam ear pads can become worn or damaged if they are not handled or stored properly. They can be replaced separately from the headphone set. The headphone replacement foam ear pads can be ordered in pairs. See your dealer/retailer for more information. Parental Control This button is located behind the video screen. Press this button while a DVD or CD is playing to freeze the video and mute the audio. The video screen displays Parental Control ON and the power indicator light on the DVD player flashes. It also disables all other button operations from the remote control and the DVD player, with the exception of the eject button. Press this button again to restore operation of the DVD player. This button can also be used to turn the DVD player power on and automatically resume play if the ignition is in RUN, ACCESSORY, or if Retained Accessory Power (RAP) is active. Headphones The RSE system includes two sets of wireless headphones. Each set of headphones has an ON/OFF control. An indicator light illuminates on the headphones when they are on. If the light does not illuminate, the batteries may need to be replaced. See "Battery Replacement" following for more information. 3-88