Feature:1. Premium Lens: Coated with film, the K9 lens ensures less light reflection and improved light transmission performance.2. Easy Viewing: Has high measuring accuracy, short ranging time, intuitive distance display, low power consumption, etc.3. Reliable Use: Enables indirect measurement of height and level, very reliable under various terrains and environments.4. Wide Utility: Widely used in power equipment installation, highway, municipal engineering, forestry design and so on.5. Simple Carrying: Designed to have a light weight and a compact size as well, the range finder is simple to carry.Specification:Item Type: Range FinderModel: SW-M500Material: ABSBattery: 3.7V, 750mAh Li ion lithium battery (built in battery). Application: Suitable for outdoor activities and measurement such as golfs, hunting, electricity, forestry, etc.Measuring Range: Approx. 3 ~ 500m / 9.84 ~ 1640.42ftUnit: M, YMeasurement Response Time: <0.5sTelescope Magnification: 6X±5%Viewing Field: 7.0°±5%Objective Lens Aperture: Approx. 19mm / 0.75inEyepiece Aperture: Approx. 15mm / 0.59inExit Pupil Diameter: Approx. 3.7mm / 0.15inVisibility Adjustment Range: ±6° Diopter Package List:1 x Range Finder1 x User Manual1 x USB Cable1 x Carrying Bag1 x LanyardNote:1. Do not touch the lens surfaces with your fingers to avoid damaging the film on the lens surfaces. 2. Please gently wipe the lens with a lens cloth, do not use other objects to wipe. 3. When carrying, avoid collision or heavy pressure.