Product Description Laser type Class 2 660/532 N.M.working period 0 - 20 metersprecision /- 0.2 mm/m.Auto level /- 4 degreesprotection level IP 54power source 3.7V / 3000 mAh Li-ion built-incan use 6 hours continuouslyThreaded hole per tripod 5/8weight 0.7 Kg.
