The timer is a nice touch for those who want a bit of automation without complexity.
OPTO 22 G4 ODC5 Module Relay Output 60VDC 3A Motor rating 60VDC 1.5A
A nice touch is the Audiopipe logo placed subtly on the side of the relay.
You will find that the LZX920 mates well with common sockets on the market.
the GOOACC label is straightforward, and that kind of clarity is helpful during late night repairs.