I needed to replace the AC adapter for a cell phone microtower. The Insignia product is more expensive than the OEM part on Amazon, but I was able to get immediate gratification by purchasing it at Best Buy.
The Insignia AC adapter is physically much larger than the OEM part. The plug orientation also mean the product annoyingly covers multiple spots on my power strip.
When replacing an AC adapter, you need to consider the whether you need AC or DC output, output voltage, output current, whether plug polarity is positive or negative (on DC adapters), plug ID, plug OD. The on-line specifications for the product offer none of this information. The outside of the box only listed the first three pieces of information (output is DC only, voltage is user selectable between 3 and 12 V, and output current is up to 1300 mA). The instructions inside the box only added the polarity (tip of pin must be positive).
The plug ID and OD was not specified anywhere.Although it worked for my situation, I had to remove the product from its sealed packaging and test fit it.
Radio Shack was long my go-to place for this type of product, and they would have listed all of the information on the outside of the box so that you knew without opening it that everything would work.
Since Insignia is a Best Buy house brand, there is no excuse for lack of technical information on a product like this.