PRO-39 (200-0303) Optional Accessories Faxback Doc. # 8988 CONNECTING AN EARPHONE For private listening, plug an earphone into the earphone jack on the top of your scanner. This automatically disconnects the speaker. We recommend Radio Shack's earphone Cat. No. 33-175. In a noisy environment, mono headphones (Cat. No. 20-210) make listening easier. Listening Safety To protect your hearing, follow these guidelines when you use an earphone or headphones. * 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 earphone, adjust the volume to a comfortable listening level. * Do not increase the volume once you establish a comfortable listening level. Over time, your ears adapt to the volume level, so a volume level that does not cause discomfort might still damage your hearing. Traffic Safety Do not wear an earphone or headphones while operating a motor vehicle or riding a bicycle. This can create a traffic hazard and is illegal in some areas. Even though some earphones or headphones are designed to let you hear some outside sounds when listening at normal volume levels, they still present a traffic hazard. CONNECTING AN EXTENSION SPEAKER In a noisy area, an extension speaker such as Radio Shack Cat. No. 21-549, positioned in the right place, might provide more comfortable listening. Plug the speaker cable's 1/8-inch mini-plug into the scanner's earphone jack. You can also use a CAT. No. 21-541 amplified speaker in your vehicle. (RLR-02-22-94)