Feature:1. Widely used in construction, decoration, home improvement, home furnishing, furniture, etc.2. Made of high quality ABS material, durable, wear resistant, corrosion resistant.3. Fine light source, high accuracy, accurate measurement, small error, more convenient to use.4. Portable design, it effectively reduces labor strength, improves working efficiency.5. Support multiple projection methods, IP54 waterproof/dustproof, long service life.Specification:Item Type: Line LevelMaterial: ABSColor: As shown in the pictureModel: SW-311RApplication: Used in construction, decoration, home improvement, home furnishing, furniture, etc.Battery: 1.5V 2xAA battery (not included)Basic Parameters:1. Laser Class: Class 2 (IEC/EN60825-1/2014)2. Laser Wavelength: 6355 nm3. Leveling Accuracy: 3mm/10m4. Vertical and Horizontal Accuracy: 3mm/10m5. Leveling/Compensation Range: 416. Working Distance (Laser Line): 10 meters7. Working Time:> 8 hours8. Waterproof/Dustproof Grade: IP549. Working Temperature Range: -10-5010. Storage Temperature Range: -20-70.Package List:1 x Line Level(Battery Not Included)1 x Portable Bag1 x Bracket1 x Instruction ManualNote:1. During operation, please do not expose your eyes to the outgoing laser beam.2. Do not modify the instrument without authorization.Press and hold the power/lock switch on the top of the instrument to turn on the instrument and project the laser.