Optimus CTR-110 owner manual Using Earphones, Listening Safely

14-733.fm Page 6 Thursday, July 1, 1999 9:00 AM

•Always plug the adapter into the CTR-110 before you plug it into the cigarette-lighter socket, and always unplug the adapter from the cigarette-lighter socket before you unplug it from the CTR-110.

Follow these steps to use your vehi- cle’s battery.

Illustration

1.Set the DC adapter’s voltage switch to 6V.

2.Insert the DC adapter’s barrel plug into the CTR-110’s DC 6V jack.

3.Insert the other end of the adapter into your vehicle’s cigarette-lighter socket.

USING EARPHONES

For private listening, you can con- nect a pair of earphones (not sup- plied) with a 1/8-inch plug. Your local RadioShack store carries a wide se- lection of earphones.

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Insert the earphones’ 1/8-inch plug into the PHONE jack on the top of the CTR-110.

Illustration

Note: Connecting earphones auto- matically disconnects the built-in speaker.

Listening Safely

To protect your hearing, follow these guidelines when you use earphones.

•Set the volume to the lowest set- ting before you begin listening. After you begin listening, adjust the volume to a comfortable level.

•Do not listen at extremely high volume levels. Extended high- volume listening can lead to per- manent hearing loss.

•Once you set the volume, do not increase it. Over time, your ears adapt to the volume level, so a volume level that does not cause discomfort might still damage your hearing.