Dual Battery Switch w/Mounting Ring & Legs - Bulkhead MountThe Perko Dual Battery Selector Switch allows the addition of an extra battery for accessories. This switch provides the flexibility of selection between batteries or combined operation of both batteries in parallel for starting or charging. It can also serve as an emergency main disconnect switch in the event of an electrical problem. All models are make before break design and are ignition protected.Four switch positions: Both Off, Both On, Battery 1 On/Battery 2 Off, Battery 1 Off/Battery 2 OnMaterials & FinishRed polycarbonate polymer bodyBlack polymer actuator keyNickel plated terminalsFeaturesFor two or more batteriesUnique oval shape mounts in a round holeRemovable actuator keyTechnical InformationRating: 140 Amps Continuous, 200 Amps 5 Min. Intermittent, 250 Amps 30 Second StartFor use with alternators and generators 6-50 V.D.C. Marine Electrical SystemsIgnition ProtectedFace Dimensions: 3-7/8 x 3-1/4