Blue Sea Systems No. 7610 e-Series Battery Switch Dual Circuit PlusT Allows temporary isolation of house loads from engine circuit during engine cranking to protect sensitive electronics. Automatically combines battery banks during the charging cycle and isolates under discharge 12/24 Volt auto ranging voltage input Waterproof rated IP67 - temporary immersion for 30 minutes Ignition protected - safe for installation aboard gasoline powered boats Remote LED output indicates relay state away from ACR LED light indicates when batteries are combined LED blinks in undervoltage lockout and starting lockout Supports high-output alternators up to 120 Amperes Automatically combines battery banks during the charging cycle and isolates under discharge Ignition protected - safe for installation aboard gasoline-powered boats Activates from any charging source - alternators, battery chargers, Continuous Rating: 120 Amperes DC Intermittent Rating: 210 Amperes DC Terminal Stud Size 3/8"-16 (accepts M10 ring terminal) Maximum Cable Size 1/0 AWG Agency Standards: ISO 8846 / Meets SAE J1171 external ignition protection requirements / rated IP67 Weight Lbs. 1.26 Width: 3.886"; Height: 3.502"