The Akai GX-210 D is a reel-to-reel tape recorder produced by Akai in the 1970s. It is a stereo unit capable of recording and playing back audio on 7-inch reels. It features a built-in amplifier and speakers, allowing for standalone playback without external audio equipment. The GX-210 D offers different tape speeds and supports multiple track formats. It also includes features like tape counter, record level controls, and headphone output. The unit is known for its durability and reliable performance.