Line laser cross line laser series bosch gll bosch professional laser class 2 max range with receiver 20 m max range without receiver 50 m measuring function angular degree measuring accuracy 03 mmm protection class ip 54 weight 450 g operating temperature 20c 50c self levelling battery life 12h power supply 3 x aa mignon display without tripod thread 14 inch dimensions 118 x 57 x 89 mm self levelling range 4