The David White LM 110H is a easy to use, accurate, and rugged horizontal rotary laser for precise leveling applications.
Ideal for outdoor use
Simple button operation, easy to use
±1/8-in at 100-ft (3.0mm at 30m) leveling accuracy
Up to 2000-ft (600m) working range
Electronic self-leveling 
Anti-drift system alerts user when laser has been disturbed or drifts  
Enclosed rotor housing keeps laser safe from tough jobsite conditions 
Rechargeable Li-Ion battery pack with fast charging
 
Included:
LM 110H Rotary Laser
LD 120 Detector with bracket
Remote
Li-Ion Battery Pack with Charger
Carrying Case
User Guide