This Phono adapter allows 2 phono cable plugs into a single phono socket with this nickel plated adapter Works in BOTH signal directions (in and out). Combine two phono's in one or split one phono into two. Usually used to connect two components into one input or split a phono output to several cables. 2 RCA female sockets to one RCA phono plugs designed to take a phono connection to one input for example 2 sets of speakers to a single input on a hi-fi. Nickel plated connections for better sound quality and less signal loss.