This 3A flasher module provides seven flashing options for their LED lighting components. It is easy to install and works off of the auxiliary switch to their 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 ftheir 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. Features: 7 Modes 3 Amps 12V DC