MRTS Series (Modular Rain Tight Sequencer) Used for adding sequencing to an existing Square D panelboard or load center. Designed for in-door or out-door applications, the MRTS can be ordered with either one or two control boards capable of sequencing 12 or 24 Square D remote controlled breakers. Simply mount the MRTS next to an existing Square D panel, order as many remote controlled breakers as you'd like to sequence, plug-in your new breakers, wire to the control boards and you're ready for remote one button on/off sequencing of your sound system. Easy!