The Powermaster Dual Immersion Switch with Neon indicator light features two separate switches, allowing for independent control of two immersion heaters. The neon light provides a clear visual indication of when the switch is turned on, helping to prevent accidental activation or left-on scenarios. This switch is designed to handle the high current demands of an immersion heater, with a maximum current rating of 20-30 amps. It's commonly used in residential and commercial settings, particularly in properties with a high demand for hot water.