Features: Split chargers relays set ensures smart double battery charging with 140A continuous current and IP65 waterproof protections, automatically engaging at 13.3V to maintain primary battery readiness while powering accessories through a secondary battery. Featuring silicone sealed internals, vibrations resistant housing, and marine grade terminals, this 12V relays set includes all necessary components for secure installation across vehicles, and marine applications. Ideal for off road enthusiasts, owners, and marine operators requiring power management during extended trips or stationary operations. Perfect for maintaining accessory power in campers during engine off scenarios, supporting winches/lights on ATVs, or ensuring uninterrupted electronics on boats without draining starter batteries. Engineered for harsh conditions, its nylon casing withstands 30°C to 105°C extremes while 110A flame retardant cables deliver stable performances in dusty, wet, or high vibrations environments. Specifications: Continuous current: 140A Intermittent current: 160A Off voltages: 12.8V Component: plastic Charging current: 280mA Standby current: 8mA Pattern: 300cm(118.11in)/500cm(196.85in)/600cm(236.22in) Package Includes: 1 Set Battery Isolator note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.