Knife switch with indicator light integratedA quality switch power changeover suitable for every home and business store. The changeover material is made of 100% copper which can stand the pressure of electrical heat. The manual changeover 2P - 100A switch is made of pure copper. The changeover is user friendly to handle changing from public power to generator easily. This knife switch has an inbuilt surge protection to prevent damage to your appliances from power surge. It is transparent and affords early detection of melting wires if the wire is not of good quality.‎‎It also have an indicator ,the yellow and red to show the power source.