PHONES jack. Be sure you select earphones with a 1/8-inch plug.
Your local Radio Shack store sells a wide variety of earphones.
LISTENING SAFELY
To protect your hearing, follow these guidelines when you use earphones.
Do not listen at extremely high volume levels. Extended high-volume
listening can lead to permanent hearing loss.
Set the volume to its lowest level before you begin listening.
After you put on the earphones, adjust the volume to a comfortable
listening level.
Do not increase the volume once you have established a comfortable
listening level. Over time, your ears adapt to the volume level, so
a volume level that does not cause discomfort could still damage
your hearing.
TRAFFIC SAFETY
Do not wear earphones while operating a motor vehicle or riding a bicycle.
This can cause a traffic hazard and is illegal in some areas.
Even though some earphones are designed to let you hear outside sounds
when listening at normal volume levels, they still present a traffic
hazard.