Usage Tips:1. Effortless Calibration-Free Operation: Utilizing advanced pre-calibration technology, this device is ready to use straight out of the box, eliminating the need for manual adjustments and ensuring swift, accurate setup, thereby streamlining workflow and boosting efficiency.2. Precision Horizontal & Vertical Alignment: Incorporating a sophisticated laser emission system, it delivers precise horizontal and vertical lines for exact leveling and alignment in construction, carpentry, renovation, and installation tasks, with minimal error margins.3. Robust Build Quality: Encased in sturdy aluminum or reinforced plastic, it boasts excellent shock and drop resistance, maintaining stability and performance in harsh working conditions, prolonging its lifespan.4. Versatile Applications: Suited for a wide range of applications, including construction projects, home renovations, pipe installations, photography surveys, machinery installations, and more, it's an ideal tool for professionals and DIY enthusiasts alike. 5. Portable & Flexible Mounting: Compact and lightweight, it comes with versatile mounting options like tripod compatibility, allowing for easy setup on various surfaces and enhancing usability flexibility.Package Included: 1*A Red Beam Laser Calibrator 1*14250 battery 1*A USB charger