P Metric
With the P-Metric system, Section Width is measured in millimeters.
To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.
Example:

(1) P = Certain tire type used on light duty vehicles such as passenger
cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches
See also:
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Random playback
To playback a track/file(s) at random,
press the following button (random button)
while the track/file is playing.
*1: For type A, B and C audio, press the button
for 0.5 second or longer.
* ...
Power switch and volume control
The dial is used for both power (ON/OFF) and volume control. The radio is turned
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