Hopefully this isn't such a stupid question!

I have a mains powered door bell, can anyone tell me if the voltage of the
wires at the bell push is low voltage? I would have assumed so (just to
reduce the risk of electrocution)

My cousin has sent me a fantastic bell push (from America) but it does say
that the bell push should have low voltage wires, no greater than 16v. The
house came with this doorbell so I have no instructions!

TIA

Angela