Features: Automatically combines two batteries when charging and isolates the two batteries when not charging. Suitable To Install into Camper Vans, 4x4, 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). 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. Specification: 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(1/4 inch) Waterproof Level: IP68 Material: ABS Color: black Package Contents: 1 x Car Smart Battery Isolator Only the above package content, other products are not included. Note: Light reflection 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.