Feature: 1. [42X Magnification] Designed with a 40mm large aperture optical device, this optical level can magnify images up to 42X, providing accurate and precise measurements. 2. [Waterproof Design] With its waterproof construction, this level can withstand rainy conditions, ensuring durability and reliability in any environment. 3. [Bubble Observation System] The level is equipped with a bubble observation system and an adjustable foot screw handwheel to ensure the instrument is perfectly level. 4. [Clear Scale Dial] Featuring a 360° horizontal scale, this level provides clear and precise readings, facilitating easy and accurate measurements. 5. [Versatile Applications] This optical level is ideal for various construction projects, mining surveys, road surveys, bridge and tunnel measurements, and more. Specification: Item Type: Optical Level Material: Aluminum Alloy Telescope Magnification: 42X Standard Deviation of Round Trip Measurement Per Km: 0.7mm Leveling Accuracy: 0.3 Second Leveling Compensation: 15 Minute Protection Grade: IP55 Dust and Water Resistance Lens: FMC Optical Coated Lens. Package List: 1 x Optical Level 1 x Cleaning Cloth 1 x Calibration Needle 1 x Wrench 1 x Storage Box