Description: 【300A High Current】: This power cut off switch can withstand up to 300A of current, which can easily meet the switching needs of various high current devices and ensure the normal use of electrical equipment. 【Lock Design】: Equipped with a lock key, you can lock the switch when not in use to prevent accidental operation or unauthorized use, protecting the safety of electrical equipment. 【Durable and Reliable】: This Battery Isolator Master Switch is made of high quality materials, insulated and flame retardant, IP66 waterproof, can be used for a long time under various environmental conditions, providing reliable performance. 【Compact Size】: Despite its powerful features, this power cut off switch is compact size and will not take up too much space. Integrated back cover improves reliability and service life, 【Universal】: Battery Switch ON/Off suitable for RVs and yachts , large engineering vehicles, boats, ships, campers, travel trailers, trucks etc. Specification: Material: ABS pp Maximum voltage: 48V Rated current: 300A Intermittent current: 500A Scope of application: In power systems of RVs, ships, yachts, etc. Size Chart: 10.4cmx7.5cmx6cm/4.09inchx2.95inchx2.36inch Package Includes: 1 Power Off Switch Note: Please allow slightly errors due to manual measurement and different monitors.