Description:Condition: 100% Brand NewColor??As Picture Show Features:??Dual Battery Connect??Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It’s like having two separate power sources for each battery while only having one alternator! ??Waterproof and Dustproof feature??Unlike other isolators on the market, Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your Kemimoto isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. ??LED Digital Double Voltmeter??Round panel voltage monitors the 2 battery packs of the vehicle in real time, reminds you to charge or replace it in time, and better avoid battery exhaustion when starting the car engine! ??Wide Application??Smart dual battery isolator help you to connect high-power electrical appliances without worrying about short circuits, such as winches, stereos, lights, air conditioners, and more. ??Wide Compatibility??This dual battery connect & monitor Kit was built ultra-small to fit almost anywhere! The dual battery isolator is suitable for most ATV UTV, Boat, RV, Trunk, and other vehicles. Fitment:Compatible with ATV, UTV, Boats, RV, Campers, BUS, 5th wheels, off road vehicles, Rhino, Polaris, Artic, Cat, Etc. A smart battery isolator is the ultra-simple and most technologically advanced method of automatic battery isolation.These units can be installed between batteries with a common ground to automatically control the charging process to the batteries but continue to provide isolation when a charging source is unavailable.The small size and rugged construction of these units allow for quick simple installation for even the most novice DIYer.The smart isolator is also ??Dual Sensing?? which senses the charge of both batteries.If either battery is receiving a charge, e.g. a battery charger is connected to the auxiliary battery; the relay will engage and charge both batteries.The advanced technology always ensures that the first battery is fully charged (13.4v) before the connection is made to the second battery.This prevents problems that may result from your charging source being too low in amps to charge all batteries at once.If placed in linear sequence between each battery the isolator units can provide proper charging for several batteries in multiple battery setups such as in larger boats that may have 2 or more house batteries. Note: It is normal for LED to remain lit when engine is first turned off. To test unit turn headlights on briefly and LED should go out.