Garmin GPSMAP 64st, TOPO U.S. 100K with High-Sensitivity GPS and GLONASS Receiver

Sunlight-Readable 2.6" color display. Display size-1.43 x 2.15 inches and 2.6 inch diag (6.6 cm). Battery life-16 hours Expanded Internal Memory 8GB.Display resolution 160 x 240 pixels. Interface: high-speed USB and NMEA 0183 compatible DUAL BATTERY SYSTEM Use with 2 traditional AA batteries (best with Polaroid AA batteries), or the optional rechargeable NiMH battery pack that can be charged while inside the device.Weight 8.1 oz (230 g) with batteries Receive Smart Notifications* and pair with optional ANT+ sensors, such as heart rate monitor, Tempe temperature sensor, speed/cadence, or use to control your VIRB action camera (64s/64st only) Wirelessly upload data to Garmin Connect and view on smartphone, plus share activities as they happen with Live Track (64s/64st only).3-axis compass with barometric altimeter