Westpoint is a well-known brand that manufactures various home appliances, including refrigerators. A 500L double door refrigerator typically refers to a large capacity refrigerator with two separate compartments - one for the freezer and the other for the fresh food section. The 500L capacity is quite spacious and suitable for medium to large-sized families or households with a higher need for storage space.

The "Inverter" feature in a refrigerator usually indicates that the appliance utilizes inverter technology for its compressor. Inverter compressors are more energy-efficient and can adjust the cooling power according to the temperature inside the fridge, resulting in better energy savings and more consistent cooling.

Since I don't have specific details about the WNN-5019EIV model, I recommend checking Westpoint's official website or contacting their customer support to get the most up-to-date and accurate information about this particular refrigerator model. Additionally, you can also look for reviews and feedback from users who have purchased and used the product to get a better idea of its performance and reliability.