Working Range : Up to 32' Working Environment: Designed for interior use Leveling Accuracy: +/- 1/4-in @ 30' Line Accuracy: +/- 3/32-in end to end @ 10' perpendicular distance Leveling Type: Pendulum Self Leveling, +/- 4 degrees in any direction Laser Diode: Two 635-670nm Laser Class: Class 2M Batteries: 3 “AA” Alkaline batteries (included) Battery Life: Up to 60 hours intermittent use Warranty: 12 Months