The compact design makes installation easy in tight spaces. It offers an emergency combination function, drawing power from both batteries for starting or radio calls. Three mounting options are available: it can be mounted on a panel , flush, or rear-mounted. A make-before-break feature allows switching between battery packs without interrupting power. Ignition protection allows installation in the engine room of gasoline boats. Series Battery Switches 300 Amps continuous rating for outboards and small gasoline or engines. Battery management is central to the safe operation of a boat or vehicle. All boats and vehicles with an engine have at least one battery with the primary purpose of starting the engine and providing power for loads such as lights, pumps, and electronics. The safe switching between batteries, loads, and charge sources is achieved using products like the m-series battery switches. An innovative snap-together design increases reliability and without the use of internal fasteners. The back cover is one-piece with break-out-sides, for easier installation. Every stud is pressed into a copper reinforced bus for added support. Color: As Shown Material: Copper + Plastic Package Contents: 1 * battery switch 2 * screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.