Hunter x Hunter - episode 47 - 24 Nov, 2000

Gon and Killua try to repair an antenna and a computer to set up Internet. Mito tells Gon all she can about his father Ging and hands over a mysterious box Ging left. Gon manages to open the box with his Nen and finds a ring, a tape and some piece of electronic equipment there. He and Killua listen to the tape where Ging introduces himself and welcomes his son to find him if he can. (Source: Wikipedia) Yorknew City arc/Phantom Troupe arc: (3/26)