This RIGID 3 amp flasher module provides seven flashing options for your LED lighting components. It is easy to install and works off of the auxiliary switch to your lights. This model features the following modes: Single Simultaneous: Both sides flash once simultaneously, followed by a short pause. Double Simultaneous: Both sides flash twice simultaneously in quick succession, followed by a short pause. Quad Simultaneous: Both sides flash four times simultaneously in quick succession, followed by a short pause. Alternating: Alternates flashing once per side. Alternating variable speed: Same as mode 4, but at multiple speeds. Simultaneous variable speed: Same as mode 1, but at multiple speeds. Random: Randomly cycles through all previous modes. This model is specifically designed to be installed into a 12V electrical system only.