TTI TCB-881, Instruction Manual

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12. Safety Requirement
The power cable is for 12V/24V DC only. Be sure the transceiver
is off before connecting the leads of the power cable to the
power supply. It is important to observe the polarity even if the
unit is protected against the accidental inversion :
The unit must be wired for the negative ground only.
To avoid damage, do not operate your CB radio without
connecting a proper antenna.
The same colors are present on the battery and in the fuse box
of the car.
* Red : Positive pole (+)
* Black : Negative pole (-)
ENGLISH
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TCB-881