Features: 1.Premium Material: Battery switch is made of premium ABS and tinned copper material, rustproof, high strength, sturdy and durable. 2.Professional Design: Professional manufacturing, exquisite workmanship, heavy duty, 4 position (OFF?1?2?1+2), not easy to loosen. 3.Excellent Performance: Power kill switch has good electrical conductivity, IP66 waterproof, ignition protection, stable performance and high reliability. 4.Function: Make before break contact design allows switching between battery banks without power interruption, with 500 amperes continuous rating. 5.Simple Installation: The installation is simple, mounting holes accept 1/4in (M6) screw, 1/2in (M12) terminal stud, convenient for using, save your efforts. Specification: Item Type: Battery Disconnect Switch Material: ABS, Tinned copper Switch Positions: 4(OFF-1-2-1+2) Battery Combine: Yes Alternator Field Disconnect: No Maximum Voltage: 32V DC Terminal Stud Torsion: 220 in-lb (24.86 Nm) Continuous Rating: 500A Intermittent Rating: 700A (5 min) Cranking Rating 10 sec: 2750A Cranking Rating 1 min: 1150A Battery Inputs: 2 Cable Clearance For 4/0 AWG Cables: Approx. 27.94 mm/1.10in Cable Quantity to Meet Ratings: Two Cables or Terminal Cable Size to Meet Ratings: 4/0 AWG (120mm2) Mounting Holes: Accept 1/4in (M6) Screw Stud Material: Tinned Copper Terminal Stud Size: 1/2in (M12) Function: Switches isolated battery banks to all loads or combines battery banks to all loads, make before break contact design allows switching between battery banks without power interruption. Application: Ideal for Marine or RV