The Game Boy is a Nintendo manufactured handheld released initially in 1989. It was the first 10-bit handheld system from the company with a 2.6" pea soup screen and monaural sound speaker that made use of interchangeable cartridges to play many different titles. It featured A and B buttons, a D-Pad, and Select and Start buttons. This set of buttons basically makes it akin to a rearranged Nintendo Entertainment System controller. It used 4 AA batteries, but can also be used when plugged with the AC Adaptor to a plug connector. While not the first handheld system to contain cartridges, it was certainly the most popular of its time (it was, however, Nintendo's first handheld that featured interchangeable cartridges). Smart marketing and a trusted brand led the Game Boy to become the most successive handheld platform of its era despite being the least impressive when it came to technology compared to other platforms like the Sega Game Gear. The Game Boy was affordable, its batteries lasted and it was bolstered by an impressive software library. Various video games such as Tetris, Super Mario Land, Kirby's Dream Land and Pokémon games led the system to a very long life. The original Game Boy was remade various times, though the most impressive was the Game Boy Color, which gave Game Boy games color graphics while the original Game Boy just had various shades of grey.