1. Garmin eTrex 10

ETrex 10 retains the core functionality, rugged construction, affordability and long battery life that made eTrex the most dependable GPS device available. We improved the user interface and added a worldwide basemap, paperless geocaching and support for spine-mounting accessories.
Physical & Performance:
Unit dimensions, WxHxD: 2.1" x 4.0" x 1.3" (5.4 x 10.3 x 3.3 cm)
Display size, WxH: 1.4" x 1.7" (3.6 x 4.3 cm); 2.2" diag (5.6 cm)
Display resolution, WxH: 128 x 160 pixels
Display type: transflective, monochrome
Weight: 5 oz (141.7 g) with batteries
Battery: 2 AA batteries (not included); NiMH or Lithium recommended
Battery life: 25 hours
Waterproof: yes (IPX7)
Floats: no
High-sensitivity receiver: yes
Interface: USB
Maps and Memory:
Basemap: yes
Preloaded maps: no
Ability to add maps: no
Built-in memory: no
Accepts data cards: no
Waypoints/favorites/locations: 1000
Routes: 50
Track log: 10,000 points, 100 saved tracks
Features and Benefits:
Automatic routing (turn by turn routing on roads): no
Electronic compass: no
Touchscreen: no
Barometric altimeter: no
Camera: no
Geocaching-friendly: yes (paperless)
Custom maps compatible: no
Photo navigation (navigate to geotagged photos): no
Hunt/fish calendar: yes
Sun and moon information: yes
Tide tables: no
Area calculation: yes
Custom POIs (ability to add additional points of interest): yes
Unit-to-unit transfer (shares data wirelessly with similar units): no
Picture viewer: no
Garmin Connect™ compatible (online community where you analyze, categorize and share data): yes