Log Function: The log function enables up to 250 measurement results to be stored. The measurement result can be displayed in approximately 0.3 seconds on the internal display Bundle Includes: Nikon Forestry Pro II Laser Rangefinder/Hypsometer, Nikon Retractable Rangefinder Tether (Truetimber Kanati Realtree Camo), Binocular Harness, and Nikon Lenspen Cleaning System Waterproof and Fogproof: The Forestry Pro II Laser Rangefinder is waterproof (up to 1m/3.3 feet for 10 minutes) and fogproof, but not designed for underwater usage. Its battery chamber is rainproof