Can the ThunderBolt be powered by an external power adapter?
Yes. The ThunderBolt may be powered by the supplied power adapter. The adapter jack is labeled “9V DC” and is located on the back of the unit above the batttery compartment door. Only Spectrum-approved low-noise adapters are recommended for use with the ThunderBolt. Many “off-the-shelf” adapters produce too much noise for proper operation of the unit. Spectrum offers 120v, 220v, and 12v adapters for use with ThunderBolt.