Flex ALC 3/1-G/R Laser Level (509.841)With one horizontal and two vertical laser lines at a 90 angle plus plumb (red laser line), can be switched individually Plumb function Specially coated glasses ensure clean and high precision laser lines. Green laser diode The green line is easily visible, even in bad lighting conditions Extends the range from 50 metres up to 70 metres with receiver Self levelling Optical warning signal when self levelling range exceeded Self levelling which can be