Truly a small wonder, the eTrex takes the best features of a 12 parallel channel GPS receiver and put them into a six ounce package that is only four inches high and two inches wide
The result is a unit that will literally fit in the palm of your hand

Waypoints/icons: 500 with name and graphic symbol
Routes:1 reversible route with up to 50 waypoints
Tracks: Automatic track log; 10 saved tracks let you retrace your path in both directions
Trip computer: Current speed, average speed, time of sunrise/sunset, resetable maximum speed, trip timer, and trip distance
Map datums: More than 100
Position format: Lat/Lon, UTM/UPS, Maidenhead, MGRS and other grids
Receiver: Differential-ready, 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites to compute and update your position
Source: 2 AA batteries (not included)
Battery Life: Up to 22 hours
Size: 4.4"H x 2.0"W x 1.2"D (11.2 x 5.1 x 3.0 cm)
Weight:5.3 ounces (150 g) with batteries
Case: Waterproof to IEC 529 IPX7 standards
Temperature range: 5°F to 158°F (-15°C to 70°C)
User data storage: Indefinite; no memory battery required

Package includes:
Wrist strap
Owner's manual
Quick reference guide