2009 GMC Acadia Owner's Manual - Page 239

Instrument Panel In severe or extreme weather conditions the RSE system might or might not work until the temperature is within the operating range. The operating range for the RSE system is above −4°F (−20°C) or below 140°F (60°C). If the temperature of the vehicle is outside of this range, heat or cool the vehicle until the temperature is within the operating range of the RSE system. 3-117 Headphones Push the power button to turn on the headphones. An indicator light located on the headphones comes on. If the light does not come on, the batteries might need to be replaced. Intermittent sound or static on the headphones can also be an indication of weak batteries. See "Battery Replacement" later in this section for more information. The headphones automatically turn off after four hours of continuous use. Parental Control The RSE system may have a Parental Control feature, depending on the radio. To enable Parental Control, press and hold the radio power button for more than two seconds to stop all system features such as: radio, video screen, RSA, DVD and/or CD. While Parental Control is on, Q displays. When the radio is turned back on, Parental Control is unlocked. The RSE includes two 2-channel wireless headphones that are dedicated to this system. Channel 1 is dedicated to the video screen, while Channel 2 is dedicated to RSA selections. These headphones are used to listen to media such as CDs, DVDs, MP3/WMAs, DVD-As, radio, any auxiliary source connected to A/V jacks, or the auxiliary input jack, if the vehicle has this feature. The wireless headphones have an On/Off button, channel 1/2 switch, and a volume control. Switch the headphones to Off when not in use. To adjust the volume on the headphones, use the volume control located on the right side. Infrared transmitters are located at the rear of the RSE overhead console. The headphones shut off automatically to save the battery power if the RSE system and RSA are shut off or if the headphones are out of range of the transmitters for more than three minutes. Moving too far forward or stepping out of the vehicle, can cause the headphones to lose the audio signal.