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 laser range finder is simple to carry. Specification: Item Type: Laser Range Finder Model: SW-M500 Material: ABS Battery: 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 ~ 1640.42ft Unit: M, Y Measurement Response Time: <0.5s Telescope Magnification: 6X±5% Viewing Field: 7.0°±5% Objective Lens Aperture: Approx. 19mm / 0.75in Eyepiece Aperture: Approx. 15mm / 0.59in Exit Pupil Diameter: Approx. 3.7mm / 0.15in Visibility Adjustment Range: ±6° Diopter . Package List: 1 x Laser Range Finder1 x User Manual1 x USB Cable1 x Carrying Bag1 x Lanyard Note: 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.