Radio Shack STAY ALERT 22-1679 - Manual (Page 14)

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To select the CITY mode, press CITY once. The detector dis-
plays CITY . If the detector receives a weak speed/safety radar
signal in the CITY mode, it beeps twice, then remains quiet
unless the signal becomes very strong. If the signal strength
increases, the detector again beeps twice.
To select the CITY 1 mode, press CITY twice. The detector dis-
plays CITY 1 .
To cancel the city modes, press CITY a third time. The detector
displays HIGHWAY . The highway mode provides maximum
alert response for open-road driving.
DIMMING THE DISPLAY
To dim the display, press DARK once. The detector displays
DIM , then the display dims.
To make the display black out, press DARK again. The detector
displays DARK , then blacks out. The display dims when it is
not detecting a signal, and blacks out entirely while it is receiv-
ing a signal and for 20 seconds after the signal.
Press DARK a third time to restore the display to full bright-
ness.