eTrex 30 (010-00970-20) Enhanced ergonomics an improved interface paperless geocaching and expanded mapping capabilities makes eTrex more versatile and user-friendly while maintaining its toughness and durability-- and has an enhanced 2.2 in 65K color sunlight readable display. Durable and waterproof eTrex 30 is built to withstand the elements. It has an upgraded interface and stands strong against the elements. eTrex 30 adds a built-in 3-axis tilt-compensated electronic compass which shows your heading even when you?re standing still without holding it level. Also added is a barometric altimeter which tracks changes in pressure to pinpoint your precise altitude. Battery life 25 hours (2 AA - not included) - USB Cable included. Blk/Grey