RV Power Outlet Box 200A Single Circuit 2 M10 Terminal Power Outlet Panel with Disconnect Switch and Water Resistant Cover for Campervan Caravan Item Type: RV Power Outlet Box Installation Type: Embedded Hole Mounting, comes with installation screws Installation Opening Size: Approx. 90 x 115mm / 3.5 x 4.5in Rated Current: DC200A Instant Maximum Current: DC300A Operating Voltage: DC 12V-48V Electrical Life: 10000 Times Screw Diameter: M10 x 2 Usage: ON OFF Terminal Screw Size: M10 x 2 Installation Steps: 1. Find the installation location, marking the drilling position. 2. Drill a 90 x 115mm square corner hole. 3. Place the power box into the hole and connect the circuit. 4. Secure the power box with screws to complete the installation. (Installation requires drilling and wiring, we strongly recommend professional mechanical installation to ensure your best shopping experience)