The rigid, lightweight and easy to use design of the Garmin eTrex Summit GPS makes it fun and practical. This Garmin outdoor GPS receiver features a barometric altimeter, which keeps you updated with your accurate altitude. The built-in electronic compass of this Garmin handheld GPS device lets you know the bearing information even if you are standing immobile. The Garmin eTrex Summit GPS features a trip computer, which monitors a number of things. Just turn on the WAAS system on this Garmin outdoor GPS receiver and get increased accuracy of your position, reporting to within three meters. The battery life of this Garmin handheld GPS device is up to 22 hours and the 4 level gray LCD display lets you read the info with ease and clarity.