Feature: 1. Compact, lightweight and portable, with a portable case, easy and quick to move and store. 2. It can output 16 lines individually or simultaneously, with more precise positioning, and has a 3° self leveling system, which is flexible and stable. 3. Adopting premium diodes and high accuracy conical mirrors, the emitted lines are fine and bright, with high accuracy and adjustable brightness. 4. Equipped with self check calibration function, ≤3° automatic leveling, but if the angle exceeds 3°, the light will continue to flash, and the level will make a "beep" sound to remind you to reset on flat ground. 5. The button is wear resistant, highly sensitive, can quickly switch line mode, and feels comfortable. Specification: Wavelength: 520nm (green) Working distance: within 30 meters indoors, 20 meters outdoors Distance from wall/ground: 7mm/6mm Automatic correction range: ±3 Vertical and horizontal accuracy: ±1mm/5m Rotation angle: 360° Using temperature: -5 degrees Celsius ~ 50 degrees Celsius Battery: 2 * rechargeable li battery, 3.7V, 2400mAh (included) Water resistant grade: IP54 Working distance: 10m Tripod interface: 5/8". Package List: 1 * Level 2 * Batteries 1 * Battery charger 1 * 1m black tripod 1 * Wall bracket 1 * Glasses 1 * Iron plate 1 * Green target board 1 * Lifting platform 1 * Remote control 1 * Tripod interface 1 * Triangular fine tuning base 1 * Instruction manual (5 languages)