Feature:1. Better Design: With aspheric optical focusing lens and dual light sensitive holes for enhanced reflected light reception and optical compensation.2. High Accuracy: The laser measure has a wide measurement range of 0.05 to 30 meters, high in accuracy and efficiency and low in power consumption.3. Useful Memory: Able to store a mass of data up to 99 sets, which makes it much easier to check and compare to date and largely simplify your work.4. Good Material: The application of high strength aluminum alloy material ensures durability for long use, and good protection on the laser measure.5. Easy Carrying: Designed to have a light weight and a compact size as well, the convenient carrying and storage enables simpler daily using.Specification:Item Type: Laser MeasureModel: SW-M30BMaterial: Aluminum alloy. Battery: Built in lithium battery 3.7V 220mAh. Application: For distance measurement. Distance Measurement Range: Approx. 0.05 ~ 30m / 0.16 ~ 98.43ftDistance measurement accuracy: (5mm+d x 1/10,000). Minimum Display Unit: 0.001m. Laser Type: Class 2, 630~670nm, <1mW. .Package List:1 xLaser Measure1 x USB Cable1 x User Manual