Automatically combines two batteries when charging and isolates the two batteries when not charging. Suitable To Install into Camper Vans, 4x4, Leisure Vehicles and 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). Surface 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) or 330mA(Engage) or 0mA (Storage) Terminal Studs|: M6(1 or 4inch) Waterproof Level: IP67 Material:ABS colour:As Shown Package Contents: 1 x Split Charge Relay Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.