Pro Installer 400A Selector Battery Switch - MC10Power requirements on boats have increased, and these 2 Selector switches offer high power capacity (400 amps continuous), the ability to easily fit doubled cables, and conform to the industry standard mounting footprint (Guest, Perko, Blue Sea). Please note selector switches will not separate electronics from harmful engine starting spikes.SpecificationsMounting: Surface, Rear or FrontVoltage: 48v DC (for 12-48v systems)Rating: 400 Cont / 600 Inter / 1500 CrankDims: 3.85" x 3.85" x 3.62"Operation: 1-2-Both-OffStud: 3x 10 mm (3.8")WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.