1、High Quality Material: Battery switch is made of high quality ABS and metal material, with maximum conductivity, high strength, sturdy and durable. 2、Pratical Design: Make before break contact design allows switching between battery banks without power interruption, practical and convenient. 3、Excellent Performance: Mini battery switch with ignition protection and IP66 waterproof, can be safely installed on gasoline powered boats. 4、Function: 300A Battery switches can isolate the potentially destructive energy in the battery banks when boat is not in use or during emergencies. 5、Wide Application: Single circuit battery switch can be used for yachts, RVs, modified cars, marine, boat, etc, have a long service time.