[. . . ] â· In vehicles or in buildings, radio reception may be difficult or noisy. Road safety Do not use headphones while driving, cycling, or operating any motorized vehicle. [. . . ] Road safety Do not use headphones while driving, cycling, or operating any motorized vehicle. It can also be potentially dangerous to play your headphones at high volume while walking, especially at pedestrian crossings. You should exercise extreme caution or discontinue use in potentially hazardous situations. If you experience a ringing in your ears, reduce volume or discontinue use. This will allow you to hear outside sounds and to be considerate to people around you. If you have any questions or problem concerning your unit, please consult the nearest Sony dealer. A) Insert one size AAA (R03) battery (not supplied) with the ` and ' marks aligned correctly. Battery life (approximate hours) Sony alkaline Sony size size AAA (LR03) AAA (R03) battery battery FM 35 16 AM 42 20 To improve radio reception FM: Do not wind up the cord or tie it in a knot, the neck strap cord and the headphones cord serve as an FM antenna. â· To avoid damage from possible battery leakage, remove the battery when unit will not be used for a long time. â· You can use the supplied clip to attach the radio to your clothes. [. . . ] â· To avoid damage from possible battery leakage, remove the battery when unit will not be used for a long time. â· You can use the supplied clip to attach the radio to your clothes. [. . . ]