This is the Sears version of the Atari 2800. The Atari 2800 is super rare as it was only released in Japan for a limited time and didn't sell very well. Here's the Wikipedia on it:

The Atari 2800 was the European and Japanese version of the Atari 2600, released in 1983. It was the first official release of the 2600 in Japan and then later on Europe, despite companies like Epoch who had distributed the 2600 in Japan before.

The 2800's design was similar to the later Atari 7800; the 7800 would use a modified 2800 case. The controllers used a combination of an 8-direction digital joystick and a 270-degree paddle. Up to four of them could be connected to the system through the 4 controller ports on the front of the system.

Around 30 games were released for the 2800. Although the boxes were in Japanese and had a silver/red color scheme that was similar to the packaging of Atari's games of the time, the cartridges themselves had identical labels as the ones that were available in America, most likely to reduce costs.

However, the 2800 never had a chance in Japan. It released right before the Nintendo Famicom (released as the NES in the US), which shortly became the most popular video game system in Japan.