Features: 1.Function: Switch the isolated battery pack to all loads, or combine the battery pack to all loads, first on and then off contact design, allowing switching between battery packs without interrupting power. 2.Power Saving: The battery circuit shut off switch help eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. 3.Material: Tinned copper studs offer high electrical conductivity and rust proof, wear resistant, ignition protection, and one piece binding post design will not loosen over time. 4.Practical: This battery isolator switch is used for 32V DC systems to isolate and secure the electrical system, to achieve safe switching between batteries, loads, and charge sources. 5.Wide Application: This black battery disconnect switch is applicable for marine, Boat, RV, with 3/8in terminal stud size, adaptable for M10 screw. Specification: Item Type: Marine Selector Battery Switch_x000D_ Material: ABS, tinned copper_x000D_ _x000D_ Switch Position: OFF-1-2-1+2_x000D_ Maximum Voltage: 32V DC_x000D_ Continuous Rating: 300A_x000D_ Intermittent Rating: 500A (5 min)_x000D_ Cranking Rating: 30 seconds 900A per channel_x000D_ Battery Input: 2_x000D_ Mounting Hole: Accepts M10 screws_x000D_ Stud Sizes: 3/8in 16 (M10)_x000D_ Application: Suitable for boat, RV