viiPacemakers. Pacemaker manufacturers recommend that a minimum separationof 15.3 centimeters (6 inches) be maintained between wireless devices and apacemaker to avoid potential interference with the pacemaker. Theserecommendations are consistent with the independent research by andrecommendations of Wireless Technology Research. Persons with pacemakersshould do the following:• Always keep the device more than 15.3 centimeters (6 inches) from thepacemaker• Not carry the device near your pacemaker when the device is switched o. Ifyou suspect interference, switch off your device, and move it .Hearing aids. Some digital wireless devices may interfere with some hearingaids. If interference occurs, consult your service provider.VehiclesRF signals may affect improperly installed or inadequately shielded electronicsystems in motor vehicles such as electronic fuel injection systems, electronicantiskid (antilock) braking systems, electronic speed control systems, and air bagsystems. For more information, check with the manufacturer, or itsrepresentative, of your vehicle or any equipment that has been added. Onlyqualified personnel should service the device, or install the device in a vehicle.Faulty installation or service may be dangerous and may invalidate anywarranty that may apply to the device. Check regularly that all wirelessequipment in your vehicle is mounted and operating properly. Do not store orcarry flammable liquids, gases, or explosive materials in the same compartmentas the device, its parts, or enhancements. For vehicles equipped with an air bag,remember that air bags inflate with great force. Do not place objects, includinginstalled or portable wireless equipment in the area over the air bag or in theair bag deployment area. If in-vehicle wireless equipment is improperlyinstalled, and the air bag inflates, serious injury could result. Using your devicewhile flying in aircraft is prohibited. Switch off your device before boarding anaircraft. The use of wireless teledevices in an aircraft may be dangerous to theoperation of the aircraft, disrupt the wireless telephone network, and may beillegal.Potentially explosive environmentsSwitch off your device when in any area with a potentially explosiveatmosphere and obey all signs and instructions. Potentially explosiveatmospheres include areas where you would normally be advised to turn offyour vehicle engine. Sparks in such areas could cause an explosion or fireresulting in bodily injury or even death. Switch off the device at refueling pointssuch as near gas pumps at service stations. Observe restrictions on the use ofradio equipment in fuel depots, storage, and distribution areas; chemical plants;or where blasting operations are in progress. Areas with a potentially explosiveatmosphere are often, but not always, clearly marked. They include below deckon boats, chemical transfer or storage facilities, vehicles using liquefiedpetroleum gas (such as propane or butane), and areas where the air containschemicals or particles such as grain, dust or metal powders.