This 3A 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: Double Alternating: Alternates flashing twice per side. Quad Alternating: Alternates flashing four times in quick succession per side. Quint Alternating: Alternates flashing five times in quick succession per side. Mega Alternating: Alternates one bright flash per side. 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. Random: Randomly cycles through all previous modes. This model is specifically designed to be installed into a 24V electrical system only.