Line laser series bosch gtl bosch professional laser class 2 max range with receiver 50 m max range without receiver 20 m measuring function angular degree measuring accuracy 02 mmm protection class ip 54 weight 450 g operating temperature 20c 50c battery life 20h power supply battery operation display without tripod thread 14 inch dimensions 115 x 57 x 89 mm speed of rotation rpm 600 self levelling range 4 included in del