FULL LAYOUT WITH 3 X 360 LINE LASER: one 360° horizontal and two 360° Vertical Planes BETTER ACCURACY: lines precision: ± 1/13 inch @ 32.8 ft SELF LEVELING : by magnetic damping, leveling range: ±4 (degree) MULTI-FUNCTION LASER LEVEL: Pulse mode , tilt function,receiver/detector function POWER SUPPLY: it suitable for 1.2 V AA batteries , 1.5 V AA batteries , 3.7 V lithium battery