Features:Automatically combines two batteries when charging and isolates the two batteries when not charging.Suitable To Install into Van, , Vehicles & Applications.Not 70 Amp Cable As Per Some Other Similar Priced Kits. No voltage 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 provides flexibility when installing.Optional Storage Mode allows power consumption when engine is off.Specifications:Automotive Dual Battery Digital Display Isolator Relay Protection Voltage Split Charge 12V 140ANominal Voltage: DC 12VCombine Voltage: DC 13.3VOpen Voltage: DC 12.8VContinuous Rating: DC 125AIntermittent Rating: DC 140APower Consumption: 10mA (Standby)/ 330mA() / 0mA (Storage)Terminal Studs|: M6(1/4 inch)Waterproof Level: IP67size: 6.5cm x 6.5cm x 5cmMaterial: ABScolour: blackPackage Contents:2 x 140 AMP Battery Isolator2 x Blue Ring Terminal8 x ScrewOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.