6-way Fuse Box Dual Battery Isolator Kit with 12v 140amp Voltage Sensitive Relay Charger for Truck S

Smart battery isolator instructions:Dual Battery Isolator\/Voltage Sensitive Relay designed for 12V applications.Dual battery isolators sense the resulting input voltage and automatically connect\/disconnect appliances or circuits at a pre-set voltage, eliminating the possibility of primary battery discharge. Features a weatherproof body (IP65) and durable silver tips.The dual battery isolator also features surge protection and LED indicator lights designed to alert the user when the unit is engaged.Dual battery isolators are perfect for dual battery setups because they enable both batteries to charge at the same time and then isolate the batteries from each other when the vehicle is off, ensuring your battery is always and ready to go.Notice:The black wire inside the VSR must be connected to the ground\/negative terminal of the battery, the yellow wire inside the VSR is used for emergency charging (forced charging from the starting battery to the idle battery no matter the starting battery voltage is higher or lower than 12.8V), if you 't want to use the emergency The charging function can also not be used.Features:Designed for dual battery systemCompatible with most 12V charging systems - Surge protectedAutomatically sense the voltage level of the main batteryeasy to installCut-in voltage: 13.3VCut-out voltage: 12.8VColor:As shownMaterial:Plastic + MetalPackage Contents:1set x Dual Battery Isolator KitOnly 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.