Automatically combines two batteries when charging and isolates the two batteries when not charging. Suitable To Install into , , Leisure Vehicles & Marine Applications. Not 70 Amp Cable As Per Some Other Similar Priced Kits. No voltage drops comparing to battery isolator diodes (0.6V). Meets ISO8846 Ignition Protection, suitable for use in engine room. Built-in LED indication (ON when VSR engages). or panel mount options provides flexibility when installing. Optional Storage Mode allows zero power consumption when engine is off. Product Specifications: Automotive Dual Battery Isolator Relay Protection Voltage Split Charge 12V 140A Nominal Voltage: DC 12V Combine Voltage: DC 13.3V Open Voltage: DC 12.8V Continuous Rating: DC 125A Intermittent Rating: DC 140A Power Consumption: 10mA (Standby)/ 330mA(Engage) / 0mA (Storage) Terminal Studs : M6(1/4inch) Waterproof Level: IP67 Material:ABS colour:As Shown Package Contents: 1 x Split Charge Relay Only the above package content, other