Green/Red Laser Calibrator, Aluminum Alloy Construction, Pre-Calibrated Laser Level with 18 Adapters, Cross-Border Aiming Instrument 1. Calibration-Free Operation: Features factory pre-calibration for immediate use without manual adjustment, enabling quick and accurate setup. 2. Horizontal and Vertical Alignment: Projects precise horizontal and vertical laser lines for leveling and alignment in construction, carpentry, renovation, and installation tasks. 3. Durable Housing: Made of aluminum alloy or reinforced plastic for shock resistance and reliable performance in demanding environments. 4. Wide Application Range: Suitable for construction, home improvement, plumbing, photography, machinery setup, and other professional or DIY projects. 5. Portable Design with Flexible Mounting: Compact and lightweight; compatible with tripods and various mounting surfaces for versatile use. Package Includes: 1 x Red Beam Laser Calibrator, 1 x AA Battery, 1 x USB Charger