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 4"x2". The result is a unit that will literally fit in the palm of your hand. All buttons are located on either side of the unit, allowing for simple, one handed operation that will not obstruct your view of the display. In fact, the Etrex features only five operator buttons for the ultimate in user friendly design. Thanks to its bright yellow case, the Etrex will be hard to misplace and easy to find in any boat or backpack. The Etrex is waterproof so it can take an accidental splash or dunk in the water and still continue to perform.