Feature: 1. Reliable Structure: The auto level adopts an aluminum alloy body, wear and oxidation resistance. It has IP54 water and dust proof rating, and the compensator comes withsealing ring, allowing the level to work in harsh environments. 2. Accurate Measurement: This optical level supports self leveling to ensure accurate measurement. Magnetic damping compensator, with large compensation space, stable structure, and stable measurement. 3. Clear Field of View: This self leveling auto level is equipped with high definition eyepiece to ensure accurate observation. The cross line can be clearly observed by rotating the eyepiece, supports cross line correction. 4. Bubble Observer: Equipped with round water bubble observer to assist in leveling, adjust the foot screw handwheel to the center circle, rotate the bubble instrument 180°, and keep the round bubble in the center. 5. Scale Display: This automatic optical level has a clear dial, simple and intuitive, supports 360 degree fine tuning, 360 degree level scale display, with scale locating identification, improving work efficiency. Specification: Item Type: Automatic Level Material: Aluminum Alloy Compensator Type: Magnetic Damping Compensator Round Trip Deviation Per 1KM: 1.5mm Magnification: 32X Image: Erect Image Objective Lens Aperture: Approx. 30mm / 1.18in Field of View: 1 Degree 20 Minutes Shortest Visual Distance: Approx. 0.5m / 1.64ft Multiplication Addition Constant: 100/0 Compensator Working Range: ±15 Minutes Leveling Accuracy: ±0.4 Seconds Round Bubble Accuracy: 8 Minutes / 2mm Rotating Base: 360° or 400° Angle Optional Automatic Leveling Accuracy: ≤0.5mm Battery: 1 x Lithium Battery (built in battery) Capacity: 500mAh (single battery capacity) Water and Dust Proof: IP54. Package List: 1 x Automatic Level 1 x Vertical Line 2 x Wrenches 1 x User Manual 1 x Storage Box