Item Name: Switch Kit Heavy-Duty Master Isolator Battery Disconnect Switch Cut Off Kill. Material: aluminum alloy + copperRated current: 300AProduct function: prevent leakage, protect power supply, safely disconnect the batteryInstantaneous current: 1000AScope of application: RV, yacht, truck, truck, automobile, engineering vehicle100% Brand New And High QualitySpecifications:Size: 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