Bushnell 363500 Onix 350 GPS with sensors Compact GPS navigator with TruView navigation layering technology Layers satellite photo, topographical map, and compass on same screen Lets you plot course by comparing surroundings with onscreen pictures 3.5-inch full-color LCD display; barometric pressure and temperature sensors Embedded 512 MB microSD card; measures 3.1 x 7 x 0.55 inches (W x H x D)