Measuring a mere 4" high by 2" wide, the new eTrex is the most compact handheld GPS receiver on the market, yet features a powerful12-parallel-channel receiver that fits into a 6 oz. package. Sportinga sleek new design, the eTrex has all of its control buttons locatedon the side of the unit for simple, one-handed operation. It isalso completely waterproof, and its bright yellow case will makeit hard to misplace. Two AA batteries will operate the eTrex for18 hours, and the unit can store up to 500 waypoints with graphicicons. eTrex also has TracBack, which allows you to reverse yourtrack log, and is differential-ready. GARMIN International,Olathe, KS; (913) 397-8200; www.garmin.com.