The GPSMAP 60CSx features aCanon PowerShot G10,14.7Mpixel, removable microSD card for detailed mapping memory and a waterproof, rugged housing. The microSD card slot is located inside the waterproof battery compartment. Users can load map data and transfer routes and waypoints through the unit's fast USB connection. In addition, this unit features a new, highly sensitive GPS receiver that acquires satellites faster and lets users track their location in challenging conditions, such as heavy foliage or deep canyons. The GPSMAP 60CSx also incorporates a barometric altimeter for extremely accurate elevation data and an electronic compass that displays an accurate heading while standing still. It is considered the mainstay among serious outdoor enthusiasts offering a large color TFT display and turn-by-turn routing capability. The unit comes with a blank 64 MB microSD card.