Features UPGRADED DESIGN: Adopt double sensitive holes, which enhance optical compensation, aspheric optical focusing mirror enhances reflected light reception. DATA STORAGE: The laser distance meter supports 99 groups of data storage, which can be saved, viewed and compared at any time. MILLIMETER LEVEL ACCURACY: The range finder can measure a wide range of 0.05 to 40m, while ensuring millimeter level accuracy. EXCELLENT LASER COMPONENTS: Using high grade laser components, which offers accurate, stable and fast measurement with low power consumption. HIGH STRENGTH BODY: Made of high precise mold at one time, high strength aluminum alloy material can better protect the body. Specification: Item Type: Laser Distance Measure Material: Aluminum Alloy Model: SW 24A Battery: Lithium Battery 3.7V 370mah (Built in) Purpose: Distance Detection Basic Parameters: Distance Measurement Range: Approx. 0.05-40m/2-1574.8in Distance Measurement Accuracy: ±(2mm + d x 1/10000) Laser Type: Class 2 630-670nm, <1mW Package List:1 x Laser Distance Measure1 x USB Cable1 x Manual Package List 1 x Laser Distance Measure 1 x USB Cable 1 x Manual