There are five versions of the PlayStation Portable, the PSP-1000 (also known as "PSP fat"), PSP-2000 ("slim and light" edition, a lighter version of the original PSP), PSP-3000 ("bright and light" edition, that includes a built in microphone and improved LCD), PSP-N1000 (or PSP Go, with a sliding screen design, bluetooth and internal storage of 16GB replacing the UMD drive.) and PSP-E1000 (similar to PSP-3000, but without stereo sound, Wi-Fi and microphone).