Features: 1.When the engine is started, the starter battery and the supercharger battery are separated, and only the starter battery is allowed to be charged. When the charging voltage reaches 13.3 volts, the voltage?sensitive relay will be activated so that the starter battery and auxiliary battery can be charged. The red light in the upper left corner of the lighting indicates this situation. 2.When the engine stops and the battery voltage drops below 12.8V, disconnect the VSR by separating the starter battery and the auxiliary battery. At this time, the indicator light will go out and the auxiliary battery will continue to supply power to all accessories without worrying about draining the starter battery. 3.Compared with the battery isolation diode (0.6V), the voltage does not drop. When the motor is turned on, the storage mode allows no power consumption. 4.Sturdy fiberglass reinforced nylon shell, high strength, corrosion resistant, not easy to be damaged, which has long service life. 5.Support panel or surface installation, flexible to use, it can meet your different installation needs, bring much convenience for you. Specification: Item Type: Battery Isolator_x000D_ Material: Plastic _x000D_ Nominal Voltage: 12V DC_x000D_ Combine Voltage: DC 13.3V_x000D_ Open Voltage: DC 12.8V_x000D_ Continuous Classification: DC 125A_x000D_ Intermittent Sorting: DC 140A_x000D_ Power Consumption: 10mA (standby) / 330mA (share) / 0mA (storage)_x000D_ Terminal Bolt: M6 (1/4in) PackageList: 1 x Battery Isolator 1 x Terminal 4 x Screws 1 x Manual