Duka Atuman Laser Angle Casting Instrument Real time Angle Meter LI 1 with Double-sided High-definition LED Screen Due to product upgrades, the Single Laser Version offers more stable measurement data. It is recommended to order the single laser version. Two versions are available in the link: Dual Laser and Single Laser. Please select the correct version when placing your order. Note: This is a Youpin Ecosystem Product. [No Youpin logo is present on the product.] Product Parameters Name: DUKA LI1 Laser Angle Projector Product Size: 120*20*35mm Product Net Weight: 95g Laser Wavelength: 660nm Laser Class: Class II Protection Level: IP54 Indoor Distance: 10m Accuracy: 0.5 Battery: 730mAh Rechargeable Lithium Battery Operating Mode: Absolute Angle + Relative Angle