... Electronic self-leveling, 2,wide leveling range, 3,high precision and stability Features and FunctionsSelf-leveling, and laser flashing when beyond self-leveling ... rangeAble to project four vertical lines, one horizontal line and one plumb-down beam, thus to realize: -One cross ... : Class IIAccuracy: ±1/4"/100ft. (±1mm/5m)Self-leveling range: ±3°Power: 4 x AA alkaline batteriesLow voltage ...