Nintendo produced and sold about 2.3 million NES Classic Editions from November 2016 through April 2017, with shipments selling out nearly immediately. In April 2017, Nintendo announced they were discontinuing the product, leading to consumer confusion, and incidents of greatly increased pricing among private sellers. Due to the demand of the NES Classic, and the success of the Super NES Classic Edition console, Nintendo re-introduced a limited run of the NES Classic on June 29, 2018. Production was discontinued again in December 2018. It was well-received for its emulation quality.

The NES Classic Edition is a dedicated console for emulating 30 Nintendo Entertainment System (NES) games. The console is distributed in two versions; one for Japan, featuring the likeness of the original Family Computer (Famicom), and one for the rest of the world, which looks like the original NES. For the NES version, all of the games are based on their US release, running at 60 Hz and using the names by which they were released in the United States. While the Famicom version’s interface is only in Japanese, the NES version supports up to eight other languages, but neither affects the language for their games themselves.

Internally, the console uses an Allwinner R16 system on a chip with four ARM Cortex-A7 central processing cores and an ARM Mali 400 MP2 graphics processing unit. It includes 512 MB of flash storage and 256 MB of DDR3 memory.

For video output, the system features an HDMI connection, which puts out 720p at 60 Hz video for all games. 

Source: Wikipedia (https://en.wikipedia.org/wiki/NES_Classic_Edition)
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