Pharos 150 3.5-Inch Widescreen Portable Drive GPS Navigator with Text-To-Speech (Black) Large 3.5" TFT LCD with 16.7 million colors Fast route calculation by 32-bit CPU processor Text-To-Speech; turn-by-turn directions with voice prompts announcing the street name Entire US maps; NAVTEQ ON BOARD Built-in ultra sensitive 20-channel SiRFStarII GPS for fast and accurate positioning