Power Acoustik PTID-4333NR Owner's Manual page 7

Brake Control
Connect the brake control wire AUTO_ANT (see Wiring Diagram). It is necessary to
connect the Brake Control wire to the Hand-brake switch of the car. While driving, the
TFT monitor will display the alarm picture (see as follows) in order to ensure the
safety.
Under the Rear View Mode, the Brake Control function is no effective.
Telephone Mute Control (Optional)
Connect the telephone mute control wire TEL_MUTE (see Wiring Diagram). If there
is a vehicle call comes in, the sound volume will mute off automatically, and TFT
monitor shows: PHONE...; when call finished, the sound volume will recover to
former volume, and the words PHONE... disappear.
Auto Antenna Control
Connect the auto antenna control wire AUTO_ANT (see Wiring Diagram). The
antenna will lift when the unit startup; it will descend when the unit turnoff.
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