The stabila lar200 self levelling auto rotation laser is simple and eays to use one button operation its robust design with patented sps shock protection system prevents the laser from being damaged if accidently dropped onto concrete ip65 rated against water projected from a nozzle dust tight it also works in extrem outdoor temperatures 10 to 60c 14 to 140f powered by two d cell batteries that are included offering around 120 hours of operation it is supplied with the stabila rec300 receive