Sewell Ghost Wire 2.0, Super Flat Adhesive Speaker Wire, 18 AWG, 4 Conductor, 50 ft. Spool, White,

What distances can the 4 conductor 18 Awg be used for within signal degradation?

Has anyone used this under padded carpet? Thinking of running along the cement slab in my basement under padding and carpet.

Can you run usb 5v dc power over this wire?

What is new or different about version 2.0?