The Razor HD 4000 is the essential companion for the extreme hunter, archery and shooter. The extremely effective angle compensated laser rangefinder features four targeting modes: Normal Mode, First Mode, Last Mode and Extended Laser Range Mode; all for any ranging environment. The primary HCD (Horizontal Component Distance) range mode provides key angle compensated range information required by the vast majority of shooters in a simple, quick to read display. The Razor HD 4000 also has LOS (Line of Sight) range mode and scan feature. Targeting Modes Normal Mode: This is the standard mode providing the range of the target with the strongest range result. Normal Mode is the recommended target mode for most situations. First Mode: Locks in and displays the closest distance when panning and scanning. This mode is ideal for ranging a smaller target in front of other larger or more reflective objects. Last Mode: Locks in and displays the farthest distance when panning and scanning. This mode is ideal for ranging a specific target behind a group of objects like brush, trees, rocks, etc. Extended Laser Range (ELR) Mode: The ELR target mode allows for ranging smaller, less reflective targets at extended distances. It is ideal for ranging when Normal Mode is unable to obtain a desired range. A longer response time may be required to build the desired range. For best results, it is recommended to be used on a tripod. Product Features Top of the Line Ranging Premium HD Optical System Premium Hard Case Ultra Bright Technology Magnesium Alloy Chassis Tripod Adaptable All-Weather Capable Utility Clip Waterproof Product Specifications Magnification: 7x Objective Lens: 25mm Eye Relief: 16-19mm Brightness Settings: 5 Battery: CR2 Weight: 9.9 oz. Length: 114mm Width: 34mm Minimum Range: 5yd Battery Life: >4000 range cycles Max Range: 4000yd Tree Range: 2500yd Deer Range: 2200yd