Solid-state turn-signal flasher relay; it's completely noise-free.

Mechanical flasher relay has been replaced by a solid-state relay.

Left - solid-state relay
Right - OEM flasher relay

It's completely silent! So, I found it was sometimes dangerous because I kept forgetting to turn off the turn signal. So I decided to add artificial sound. A door chime unit is used to this end.

Rather than irritating mechanical ticks, it makes clear ringing when the turn signal is on. The sound is so refreshing.