Features: Maximize battery efficiency with the split charge voltage sensitive isolator. Charge two batteries simultaneously without interference, extending their lifespan. This voltage sensitive module features intelligent charging capabilities, automatically switching power sources based on battery voltage. Say goodbye to depleted batteries and enjoy efficient power supply. Designed for car and truck drivers, this ip67 waterproof isolator ensures a stable and long lasting battery system, enhancing overall vehicle performances. Perfect for marine enthusiasts, the split charge isolator ensures reliable power supply on boats, protecting the battery system and ensuring smooth sailing. Whether you're embarking on a road trip or camping adventure, this isolator is a must have for automotive travel, providing a stable battery system for uninterrupted power. Specifications: Material:Plastic+Aluminum Size:As Picture Shown Color:Black Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Double Battery Isolator