Catch fish with a plumb line?

Especially for carp fishing, an additional function for working on plumb and swingers was installed in the signaling device.
Unlike all imported roller signaling devices, "Joy" gives light and sound signals when the angle of plumb line changes, not taking into account the movement of the fishing line, and after hooking, the signaling device automatically turns off, which ensures its operation without replacing the battery for more than 5 years.
There are no analogues to this signaling device, both in the domestic and foreign markets.