Feature: 1. 1. Compact and Portable Design: The device is compact, lightweight, and comes with a portable case, making it easy and quick to move and store. 2. 2. Precise and Stable Laser Lines: It can output 16 laser lines individually or simultaneously, offering more precise positioning. The device features a 3° self-leveling system, ensuring flexibility and stability. 3. 3. High-Quality Laser Diodes and Mirrors: Equipped with high-quality laser diodes and high-precision conical mirrors, the emitted laser lines are fine and bright, with high precision and adjustable brightness. 4. 4. Self-Check Calibration and Safety Alerts: The device has a self-check calibration function and a ≤3° automatic leveling system. If the angle exceeds 3°, the laser light will flash continuously, and the laser level will emit a "beep" sound to remind you to reset on flat ground. 5. 5. Wear-Resistant and Sensitive Buttons: The buttons are wear-resistant and highly sensitive, allowing for quick switching between line modes and providing a comfortable feel. 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: ±1.5mm/7m Rotation angle: 360° Using temperature: -5 degrees Celsius ~ 50 degrees Celsius Battery: 2 x rechargeable lithium battery, 3.7V, 2400mAh (included) Waterproof grade: IP54 Working distance: 25m Tripod interface: 5/8" Package List: 1 x Level 2 x Batteries 1 x Battery charger 1 x Wall bracket 1 x Iron plate 1 x Green target board 1 x Lifting platform 1 x Remote control 1 x Tripod interface 1 x Triangular fine-tuning base 1 x Instruction manual (5 languages)