If you use an external power source for regular operation, install alkaline batteries for emergencies. Rechargeable batteries will self- discharge, even when not used, and could have no usable power.
Caution: You must use a Class 2 power source that supplies 9V DC and delivers at least .
400 mA. Its center tip must be set to positive and its plug must fit the scanner’s PWR DC 9V jack. Using an adaptor that does not meet these specifications could damage the scanner or the adaptor.
Headphones and Speakers
You can plug headphones or an amplified speaker (neither included) into your scanner’s headphone jack. This automatically mutes the scanner’s speaker.
Even though some earphones/headphones let you hear some outside sounds when listening at normal volume levels, they still can present a traffic hazard.
To protect your hearing, follow these earphone or headphones guidelines:
•Do not listen at extremely high volume levels. Extended
•Set the volume to the lowest setting before listening. Turn on the scanner, and adjust the volume to a comfortable level.
•After 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.
