Etrex 

Truly a small wonder, the eTrex™ takes the best features of a 12 parallel channel GPS receiver and puts them into a 150 gram package that is only 11.2 cm tall and 5.1 cm wide.
All buttons are located on either side of the unit, allowing for simple, one-handed operation that won't obstruct your view of the display. In fact, the eTrex features only five operator buttons for the ultimate in user-friendly design.
No need to worry about dense tree canopy with this unit, the eTrex will continue to maintain a tight satellite lock even while operating in forest-like conditions.
The eTrex will store up to 500 user waypoints with graphic icons and boasts GARMIN's exclusive TracBack™ feature that will reverse your track log and help you navigate your way back home. In addition, the eTrex uses animated graphics that will help you identify your marked waypoints quickly and easily.

eTrex SPECIFICATIONS

Navigation Features

Waypoints/Icons	500 with name and graphic symbol
Tracks	Automatic track log; 10 saved tracks let you retrace your path in both directions
Routes	1 reversible route with up to 50 waypoints
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

Performance

Receiver	Differential-ready, 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites to compute and update your position
Acquisition Times	Warm: Approx. 15 seconds Cold: Approx. 45 seconds AutoLocate®: Approx. 5 minutes
Update Rate	1/second, continuous
Accuracy	Position: 15 meters (49 feet) RMS* Velocity: 0.1 knot RMS steady state
Dynamics	6g's
Interfaces	RS232 with NMEA 0183, RTCM 104 DGPS data format and proprietary Garmin®
Antenna	Built-in patch
Data storage	Indefinite; no memory battery required
Temp. Range	-15°C to 70°C (5°F to 158°F)

Physical

Size	11.2 H x 5.1 W x 3.0 D cm (4.4" x 2.0" x 1.2")
Weight	150 g (5.3 ozs) with batteries
Display	5.4 H x 2.7 W cm (2.1" x 1.1") high-contrast LCD with bright backlighting
Case**	Waterproof to IEC 529 IPX7 standards

Power

Battery Life	Up to 22 hours
Power	2 AA batteries (not included)

Specifications are subject to change without notice.

* Subject to accuracy degradation to 100m 2DRMS under the United States Department of Defense imposed Selective Availability Program.

** Meets IEC (European Community Specification) 529 IPX7 for protection against immersion for 30 minutes at a depth of 1 meter.