Vertical laser line projects along floor, up the wall, and across the ceiling. Smart Pendulum leveling system projects horizontal laser line with 100° fan angle. Automatic out of level sensing, ergonomic soft grip, easy access battery compartment, and convenient tripod mount threading. Specs: Accuracy up to plus/minus 7/32 in at 30 ft , dimensions 4.25 in x 2.6 in x 3.63 in Laser diode class II 635 nm, less than or equal to 1 mW. Leveling type self-Leveling, up to 4° . Mount threading 1/4- 20. Operatingtemperature 41° F/5° C - 104° F/40° C, range up to 30 ft , weight (lbs.) 0.88. Includes: (1) carrying case, (2) AA batteries.