I'm so confused. I thought electric guitars are supposed to be connected to amps...
watch this video guys:
https://www.youtube.com/watch?v=wQF3ofH5lUE
i thought live meant they are playing the instruments.. O.o
can anyone explain to me why their guitars and bass are not connected to an amp? thank you )))

I think during "lives" on TV shows, its usually artists only singing and pretending to play. During actual lives(like in their tours or performances that aren't televised), they are playing their instruments and singing. In their earlier days, they hooked up their amps but I think now they are using a wireless system for their tours but still use cables sometimes.
Wireless system(haha I think, I don't use one but its what I got when I googled it XD):

Spoiler:

TV lives are just Voice Lives, the band doesnt actually play the song because if they make a mistake or whatever it would look bad for the band and the show, so they just do live vocals, real lives and concerts are plugged in the amps, dont worry about that Also, I think this has been asked before, dont forget to check the forums before asking a question n_n

During concerts they do use wireless. You can see it for instance in this video: https://www.youtube.com/watch?v=e_HZ8Tehjww

Earlier in their career they used cables though.

thanks for all the answers
sorry. there are too many topics in the forum.i got tired of seaching
thanks again all of you guys :D