The G.hn designation is a specification for existing-wire home networking, including power lines, coaxial lines, and telephone lines. This means the adapter can work well in any environment it's placed - such as mixed environments or homes with only certain types of wiring installed at different points in time during building history (us oldtimers call them "legacy systems"). This means that the adapter can work well in mixed environments whether it's wired or wireless too! As if this isn't enough already, they are also certified by Telecommunication Equipment Industry Association (TEIA) to be equivalent to HomePlug AV2 standards which allow up 1Gbps of cap speed on an electrician level device. As an example where this would come into play; if you have a house built before 1980 then there may be a coaxial cable running through some parts instead of wires like Telephone Company did back when they had their own phone lines!