Review on 🔋 Smart Dual Battery Isolator Kit, GOLDPAR 12V 140Amp Sensitive Relay VSR Pro Dual Battery Kit with Wiring Cable, Ideal Battery Isolation Solution for Cars, Vehicles, RVs, ATVs, UTVs, Boats, Campers, and Trucks by Justin Verslues

Contains everything needed to connect a second battery. Good quality cable and plug, isolator works great. The interlock cable connects both batteries in parallel if you short it with a switch, a feature I really wanted but others didn't. This doubles the capacity of the battery when the engine is switched off. I am using a relay voltmeter display to turn on two batteries from the cab of my truck via the interlock wire. The isolator operates at the correct voltage and the customer service is the BEST. Solved all my problems and questions in a flash. I highly recommend this kit, best price, best quality, best service.