Garmin nüvi 550. Form factor: Fixed. Map storage: Internal storage, Map view options: 3D. Display diagonal: 88.9 mm (3.5 "), Display resolution: 320 x 240 pixels, Display: LCD. Weight: 215 g, Width: 107 mm, Depth: 23 mm. Battery technology: Lithium-Ion (Li-Ion), Battery life (max): 8 h