Leica R680,REBasic, Alkaline Rugby 680 2600-Feet Self Leveling Horizontal, Dual Axis Dial in Grade, Rotary Laser Kit with Rod Eye Basic Receiver, Yellow This unit contains a Class II Laser with 1mW output Self Leveling or Dial In Dual Axis Grade to 8% with the Touch of a Button Range 2,000ft, Accuracy 1/16" at 100ft Includes Rod Eye Basic Receiver, D-Cell Alkaline Battery Holder and Batteries, Case Smart Slope Function Continuously Monitors Time and Temperature Changes to Ensure Performance Over the Course of the Day Suited for Outdoor Conditions with IP67 Protection Class for Dust and Water Protection