The X-Gapa flash from Stoxdal is a popular lure for char, with a mounted double blinker.
The blinker is activated when it comes into contact with water and flashes seductively in a red color.
The flashing time is about 100 hours. The blinker comes mounted with a nylon tab and maggot hook.
Try it at char and you won't be disappointed.
This one in the color: Red Silver-
The back is shiny copper.
(Blinkers can be purchased separately)