Precise laser lines and high visibility with the GLL 2-50. Working range of up to 20m without a receiver and up to 50m with a receiver. The GLL 2-50 allows horizontal and vertical self-levelling up to ±4. The ability to interchange between vertical horizontal and laser cross lines allows for precise alignment in many applications. The GLL 2-50 is extremely precise in use with an accuracy of ±3 mm at a distance of 10m.