ITEM NAME:2x Flasher Switch Relay with Car LED Light Bulbs img *{margin:0;padding:0;.2 Pieces 2-Pin Flasher Relay. Allow LED bulbs to blink at the normal rate. Eliminate the need for tapping wires to install the load resistors. Can use a flat head screw driver to adjust the knob on the bottom to set its flashing speeds from 50c/m to 200c/m.