The Halo XRay 900 Laser Range Finder provides a maximum range of 900 yards to a reflective target with AI slope accounting technology. With 6x magnification and scan mode, the Z9X allows for constant ranging precise to +/- 1 yard. It is water resistant, comes with nylon pouch and one year warranty. The Z6X is capable of measuring distance in both yards and meters. The unit uses a CR2 lithium battery (not included).