Item Name: Kit Car Cut Off Kill Heavy-Duty Master Isolator Battery Disconnect Switch. 100% Brand New And High QualityScope of application: RV, yacht, truck, truck, automobile, engineering vehicleMaterial: aluminum alloy + copperProduct function: prevent leakage, protect power supply, safely disconnect the batterySpecifications:Rated current: 300AInstantaneous current: 1000ASize: 9*9*7CMDescription:This battery disconnect switch provides power cut off to electrical system, to help prevent battery drain, safety and efficient, when car or boat or RV is not in use, disconnects the battery safelyRated to 300 Amps continuous duty, 1000 Amps intermittent duty, used for 12-48 VDC systems to isolate and secure the electrical systemHeavy duty metal case has strong weather resistance, protects internal components of the switch for use in the harshest