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Power Requirements
This product is designed to run on 11-15 Volts DC (3 Amps typical, 7 Amps max).
NOTICE TO INSTALLERS
When installing the RT-12i in a vehicle:
Connect the power cable to an ALWAYS-ON 12 Volt line that is connected directly to the vehicle
battery.
DO NOT connect the power cable to a 12 Volt line that is
shut off when the vehicle key is removed.
DO NOT connect the power cable to a charge-guard or equivalent device.
DO NOT connect the power cable to a power converter.