The transflective handheld marine GPS tool helps users share their waypoints, tracks, and routes wirelessly to other compatible devices. It locates the user's position quickly and precisely and maintains its location even in deep canyons and heavy cover. The Garmin MAP 78 provides the sun and moon information, calculates area, base map, fish calendar picture viewer and many more features. It is a waterproof tool, and the waterproof rating is IPX7. Product Attributes: Display size - 3.6 x 5.5 cm Display resolution – 16 x 240 pixels Weight of the product - 218.3 grams Battery life - 20 hours Battery- 2AA Brand - Garmin Height – 152 mm Weight- 30 mm Physical Dimensions - 6.6 x 15.2 x 3.0 cm.