Feature:1. 40mm Large Aperture: This multipurpose leveling tool has a large 40mm aperture that magnifies the image up to 42x, which is very clear and easy to operate.2. Waterproof Design: This automatic leveling tool is designed with waterproof, which can keep the level intact in rainy days, perfect for working in any environment.3. Water Bubble Viewer: This line leveler tool instrument has a water bubble viewer, adjust the foot screw, handwheel in the center, the round water bubble instrument rotated 180 , keep the round water bubble should be in the center can be.4. Clear Scale Dial: This engineering leveling tool features a clear scale dial, with 360 leveling scale display and scale positioning markings.5. Wide Application: This level line tool has a wide range of applications and is very suitable for construction engineering surveying, deformation and settlement monitoring, mine surveying, road surveying, bridge and tunnel surveying and so on.Specification:Item Type: Surveying and Mapping Instrument LevelMaterial: Aluminum AlloyTelescope Magnification: 42XStandard Deviation of Round Trip Measurement per Kilometer: Approx. 0.7mm/0.03inLeveling Accuracy: 0.3 SecondLeveling Compensation: 15 MinutesIP55 Dustproof and WaterproofFMC Optical Coating LensBattery: Lithium Battery x 1 (Shipped With Built In Battery)Capacity: 1200mAh (Capacity Of A Single Battery).Package List:1 x Surveying and Mapping Instrument Level1 x Data Cable1 x Cleaning Cloth1 x Calibration Needle1 x Wrench1 x Storage Box