Features: This double battery isolator efficiently manages power with a 300A current capacity, allowing easy switching between batteries to extend life and reduce energy waste, ideal for stable battery isolation in demanding environments. Featuring a wide electric ranges of 6V to 32V, secure 10mm connection for durability, and waterproof construction with high strength plastic and copper materials, it ensures safe and versatile power switching in various conditions. Designed for boat owners, enthusiasts, truck drives , and automotive professional who need dependable battery management to enhances vehicle safety and performances. Perfect for marine vessels, recreational vehicles, and heavy duty trucks to provide stable power supply in outdoor adventures, harsh weather, and transportation scenarios. With its erosion resistant and conductive design, this power switches offer enhanced reliability for multiple battery systems, ensuring long lasting operate in large power applications. Specifications: Component : plastic Size: about 73x91x130mm/2.8x3.5x5.1inch Position: 4 (OFF-1-BOTH(1+2)-2) Battery combination: yes Working electric : 6-32V Continuous power rating: 300A Instantaneous current at startup: 400A Number of terminals: 3 Terminal size: 10mm Terminal length: about 15mm Package Includes: 1xBattery Selector switches note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.