The Crescent A100 DGPS is a 60 cm, rugged, low cost sub-meter WAAS DGPS system that easily integrates with any Windows Mobile handheld and most GPS/GIS field data collection software. This unit works extremely well under canopy and in the most rugged of conditions. The package includes pole adapter, extension pole, pelican case, battery, 3 year warranty on cables, batteries and antenna. Please choose how you would like to carry this unit in the field by selecting the Forester's Backpack or Orange GPS Cruise Vest below.