A d d i t i o n a l s a f e t y i n f o r m a t i o n67If you have any questions about using your wireless device with an implantedmedical device, consult your health care provider.Hearing aidsSome digital wireless devices may interfere with some hearing aids.This device includes a setting for direct connection to telecoil-equipped hearingaids. When both the telecoil hearing aid (T switch) and the phone telecoil areactivated, using the device with the aided ear will provide a direct connection foraudio through your hearing aid. The quality of sound depends on the type ofhearing aid used. You should test the device with the telecoil setting activated todetermine whether your audio performance improves. Using the telecoilhearing-aid setting consumes additional battery power.■ VehiclesRF signals may affect improperly installed or inadequately shielded electronicsystems in motor vehicles such as electronic fuel injection, electronic antilockbraking, electronic speed control, and air bag systems. For more information, checkwith the manufacturer of your vehicle or its equipment.Only qualified personnel should service the device or install the device in a vehicle.Faulty installation or service may be dangerous and may invalidate your warranty.Check regularly that all wireless device equipment in your vehicle is mounted andoperating properly. Do not store or carry flammable liquids, gases, or explosivematerials in the same compartment as the device, its parts, or accessories.Remember that air bags inflate with great force. Do not place your device oraccessories in the air bag deployment area.Switch off your device before boarding an aircraft. The use of wireless teledevicesin an aircraft may be dangerous to the operation of the aircraft and may be illegal.