Features 1、Application: Ideal for marine or RV applications, molded in durable ABS, tactile textures indicate knob with international ON OFF marks, and removable key or knob remains positively retained. 2、Function: This is a dual circuit plus switch, simultaneously switches two isolated battery banks or combines battery banks to all loads. 3、Ignition Protected: Safe for installation aboard gasoline powered boats, case design allows surface, front panel, or rear panel mounting. 4、Good Conductivity: Isolating cover with snap on sections protects rear contacts 3/8in‑16 tin plated copper studs for maximum conductivity, accepts 3/8in/0.95cm and M10 ring terminals 7/8in / 22.22mm. 5、Safe to Use: Make before break contact design allows switching between battery banks without power interruption. Specification Item Type: Battery Switch Material: ABS+Copper Continuous Working Current: 300A Maximum Working Current: 450A (5min), 675A (30s) Terminal Size: M10 Inner Stud: Copper Plated With Silver Function: Make before break contact design allows switching between battery banks without power interruption. Application: Ideal for marine or RV applications Package List 1 x Battery Switch