Designed for multiple types of tasks, the RL-SV2S can be used for horizontal, sloping and vertical laser applications. Slopes up to /- 5 degrees can be used in either the X or Y axis. Turn it on its side and use it for layout and alignment jobs. High Powered With an operating range of over 800m (diameter) the RL-SV2S has the power to cover even the biggest projects. Long Battery Life Contractors who want a laser with a long battery life will love the RL-SV2S. With an operating time of 120 hours on alkaline batteries or 65 hours with the rechargeable Ni-MH battery pack this laser will still be working long after others have quit. All Weather Dependability With the IP66 rating, the RL-SV2S is "jobsite tough" and can withstand dust, a sudden shower and even torrential rainfall