Blue Sea E-Series Red Dual Circuit Plus Battery Switch With Knob, Dual Battery Operation. Features: Simultaneously Switches Two Isolated Battery Banks Or Combines Battery Banks To All Loads Ignition Protected—Safe For Installation Aboard Gasoline Powered Boats Case Design Allows Surface Or Rear Panel Mounting Specs: Switch Type - Dual Circuit Plus Color - Red Switch Positions - 3 Battery Combine - Yes Alternator Field Disconnect - NO Maximum Voltage - 32V DC Continuous Rating - 350 Amps Intermittent Rating - 525 Amps 5 Minutes Cranking Rating 30 Sec - 700Amps Per Circuit Battery Inputs - 2 Cable Size To Meet Ratings - 4/0Awg Mounting Holes - Accept 1/4" (M6) Screw Terminal Stud Size - 3/8" Ring Terminals Weight - 1.30lb (0.59 kg) Sold As Each 16-130 K-Four Switches