Bosch Self-Leveling Cross Line Laser *Number of Beams: 2 beam *Self Leveling: Yes *Product Type: Cross Line Laser *Range: 30 ft. *Number in Package: 4 pc. *Battery Size: AA Battery *Number of Batteries Required: 2 each *Indoor or Outdoor: Indoor *Waterproof: No *Batteries Included: Yes *Color: Blue *Length: 2.8 in. *Accuracy: 0.2 in. *Material: Composite/Plastic *Accessories Included: Yes *Width: 2.2 in. *Discovery NBR, SUP