Specification: 
  Level system: With electronic sensor
  Self leveling precision: Horizontal ?20"
  Self leveling range: ?5?
  Operation rang: Diameter 500m (with detector)
  Rotation speed: 0; 60; 120; 300; 600 r. P. M. 
  Scanning angle: 0?; 10?; 45?; 90?; 180?
  Set grade: ?5?(x, y axis)
  Laser source: Laser diode, wavelength 635nm
  Down point precision: ?1mm/1.5m
  Operation temperature: -20?C ~ +50?C (-4?F ~ +122?F)
  Power supply: DC 4.8-6V (4 section of NI-MH batteries & 4 section of NI-MHrechargeable batteries)
  Hours in continuous use: Approximately 18 hours. 
  Water proof: IP 64
  Dimension: 160(L) X 160(W)X 185(H)mm
  Weight: 1.2 kg

  Operating instructions and matters needing attention
  * Electronic self-leveling, wide leveling range, high precision and stability. 
  * With MCU control, completely function, easy operation and high trustiness. 
  * Vertical setting the unit, supply a horizontal plane and vertical line, with plumb point. 
  * Lay-down jobs, supply a vertical plane and a horizontal line. 
  * With scanning function. 
  * With clockwise and counterclockwise rotating function. 
  * With setting slope dual axis. 
  * Good waterproof.