[He glances briefly at Cisco while looking over and comparing the two radios.]

There shouldn't be any problem with materials like these.

[He hesitates to answer fully. He wasn't as skilled at shapeshifting as others of his species, but in the end there was no way for Cisco to know that.]

I can't take the form of fire, or certain vapors, but I doubt these devices are run by a steam powered engine.