It offers instant route recalculations and has a built-in speaker with text-to-speech functionality to provide voice-guided directions and turn-by-turn voice prompts. The Nextar ME comes preloaded with US maps, 1.6 million points of interest, and has 2D and 3D map viewing modes. It differs from the M3 since it has built in memory as well as an SD card slot which allows the memory to be upgraded for loading additional maps. The receiver also has a rechargeable lithium-ion battery for handheld navigation and an MP3 playing mode for in-car entertainment. The Nextar ME comes with a carrying pouch, suction cup mount, stylus pen, and a 1 year limited warranty.