garmin nuvi 255w 4.3" widescreen portable gps navigator physical & performance: unit dimensions, wxhxd: 4.8"w x 2.9"h x .8"d (12.2 x 7.4 x 2.0 cm) display size, wxh: 3.81"w x 2.25"h (9.7 x 5.7 cm); 4.3" diag (10.9 cm) display resolution, wxh: 480 x 272 pixels display type: wqvga color tft with white backlight weight: 6.1 ounces (172.93 g) battery: rechargeable lithium-ion battery life: up to 4 hours waterproof: no high-sensitivity receiver: yes rohs version available: yes maps & memory: basemap: yes preloaded maps: yes ability to add maps: yes built-in memory: internal solid state accepts data cards: sd™ card (not included) waypoints/favorites/locations: 1000 routes: 0 features: voice prompts (e.g. "turn right in 500 ft."): yes (internal speaker) speaks street names (e.g. "turn right on elm street in 500 ft."): yes voice-activated navigation (operate device with spoken commands): no lane assist (guides you to the proper lane for navigation): no 3-d building view (displays buildings in 3-d): no auto sort multiple destinations (provides most direct route): no auto re-route (fast off-route and detour recalculation): yes choice of route setup (faster time, shorter distance, off road): yes route avoidance (avoid highways, tolls etc.): yes bluetooth wireless technology (connect to your phone for hands-free calling): no msn direct compatible: yes fm traffic compatible: yes xm navtraffic & radio for u.s. compatible: no speed limit indicator (displays speed limit for most major roads): yes where am i? (find closest hospitals, police & gas stations, nearest address & intersection): yes garmin locate (marks position when removed from windshield mount): no ecoroute (calculates a more fuel-efficient route) : yes qwerty or abc keyboard (choose keyboard layout): yes custom pois (ability to add additional points of interest): yes garmin garage vehicles compatible (download car-shaped icons to your device): yes garmin garage voices compatible (download custom voices to your device): yes photo navigation (navigate to geotagged photos): yes world travel clock, currency & unit converter, calculator: yes