Garmin GPSMAP 420S Navigator . Form factor: Handheld, Acquisition times - cold: 45 s, Acquisition times - warm: 15 s. Map view options: 2D, 3D. Display resolution: 240 x 320 pixels, Display size (HxV): 61 x 81.3 mm (2.4 x 3.2 "). Weight: 590 g, Width: 145 mm, Depth: 127 mm. Operating temperature range (T-T): -15 - 55 °C