Moving map features Storage: Internal storage comes preloaded with City Navigator NT for street-level detail and addresses, plus listings of nearest restaurants, hotels ATMs, etc throughout the U. S Canada and Puerto Rico or Internal memory is available for supplemental maps, MP3s and audio book media from Audible. COM. Auxiliary storage is provided by an SD card slot. Map Scale Screen-width scale 640 feet to 4, 000 miles Navigation features Routes: Automatically calculated with turnby turn instructions; Custom road preference allows user to prioritize choice of back roads or major highways; Automatic offroute recalc shows how to get back on track if you miss a turn or exit a detour function enables routing around traffic problems or road construction Voice: Navigation instructions and warnings; Has textto speech (TTS) feature that identifies turns by street name Waypoints: 500 with name and graphic symbol Trip computer: Resettable odometer, timers, average and maximum speeds Travel Kit Utilities Features: MP3 player, audio book player (for Audible. COM media), JPEG picture viewer, world travel clock with time zones, currency converter, measurement converter and calculator. Additional audio and content support is provided for optional Garmin Travel Guide and Garmin Language Guide software packages (sold separately). GPS Performance Receiver: (WAAS enabled) Acquisition times: Warm: 1 sec Cold: 38 sec Factory reset: 45 sec Update rate: 1 / second, continuous GPS accuracy: Position: 5 meters, typical Velocity: 0.5 meter / sec RMS GPS (WAAS) accuracy Position: 5 meters, typical Velocity: 0.05 meter / sec RMS Interfaces: Proprietary Garmin through USB interface USB mass storage, plug and play Antenna: Builtin patch MCX type connector for optional external GPS antenna connection Physical Size: 3.87 W 2.91 H 0.87 D (9.83 7.39 2.21 cm) Weight: 5.1 oz (144.6 g) Display: 2.8 W 2.1 H (7.2 cm x 5.4 cm); 320 240 pixels QVGA TFT landscape display, with white backlight and anti glare finger touch screen Case: Not waterproof or IPX0 Temp. Range 32 F to 140 F (0 C to 60 C) Headphone jack standard 3.5mm Power Input: 12 24 Vdc Usage: 15w max 13.8 Vdc Battery life 4 to 8 hours depending on usage