The self-leveling motors are accurate to ±10 arc seconds. LONG RANGE WITH HIGH ACCURACY: Need to shoot elevations up to 800 m from your laser? No problem - this instrument has the power and range to cover a 800 m diameter job site. KIT COMPONENTS: includes the RL-H5A laser or LS-80L, Sensor holder and Carry case.RL-H5A is the Next Generation Self-Leveling Construction Laser; With great distance and high-accuracy; Long-range operation (800 m); Smart long-range receiver; Simple, intuitive manual slope capability; ±10 Arc second horizontal accuracy; Laser product 2.4mW and class IIIa. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there's a problem, message us! We're happy to help. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Levels & Surveying Equipment\Levels & Autolevels\Rotary Lasers". The seller is "yuvix_store" and is located in this country: US. This item can be shipped to United States.