This laer calibrator is made of high-grade aluminum alloy material, lightweight, high strength, corrosion resistance, and with long service time. Highly accurate and adjustment-free design, the calibrator utilizes infrared light, with a tube straight in for a more convenient and precise adjustment. Shipment includes a full set of accessories, available on arrival and easier to use. Features: Made of high-grade aluminum alloy material, lightweight, high strength, corrosion resistance, and with long service time. Infrared calibrator, laser light has a long-distance, bright, and clear light, which better helps calibration adjustment. Highly accurate and adjustment-free design, the calibrator utilizes laser light, with a tube straight in for a more convenient and precise adjustment. The battery compartment design is simple and beautiful, the tail part can be opened by unscrewing, convenient and practical. Shipment includes a full set of accessories, available on arrival and easier to use. Specifications: Name: Laser Calibrator Material: aluminum alloy Color: red, green (optional) Battery: 1 x CR2 battery, 3V, 800mAh (included) Power: lt 5MW Diameter: 4.2mm Item size: 178 x 18 x 18mm or 7.01 x 0.71 x 0.71in Item weight: 60g or 2.12ounce Package size: 195 x 104 x 30mm or 7.80 x 4.09 x 1.18in Package weight: 131g or 4.62ounce Packing List: 1 x Laser Calibrator 1 x Screwdriver 12 x Adjustable Adapter 1 x Set of Screw 1 x Wrench