The RL-SV1S is Topcon's newest construction laser. Following in a long line of superior quality laser transmitters, the RL-SV1S is a single grade, long range, self-levelling instrument built to outperform all of it's competitors. This laser is a great tool for any general construction or engineering project and designed for use for flat work, single grade applications. Grades up to ±15° can be used in either X or Y axis. With an 800m (diameter) operating range, the RL-SV1S has the power to cover even the biggest job sites. That's not all either. Turn the RL-SV1S on it's side and use it for layout and alignment. Lay it down on the built-on mount or attach it to a tripod and the laser will electronically self-level for fast and accurate vertical applications. This multi-use laser does just about everything. This versatile construction tool is loaded with all the features contractors love, including long battery life (100 hrs/alkaline), height of instrument alert, a dual sided detector, and electronic shutters. All of these features (and others) can be accessed on the front control or on a remote control device which comes standard.