Feature:1. [Multi Purpose] The digital rolling ruler can be used to measure straight lines, circles, arbitrary curves, irregularities, cylinder diameters, etc., which is simple and practical.2. [Long Distance Measurement] The measurement range of this electronic rolling ruler is 0 to 199.999m meters, which can meet various long distance measurement needs.3. [Data Storage Function] This digital distance gauge supports storing 10 sets of data, cycling back to the first set once exceeded, improving measurement efficiency.4. [Clear LCD Screen] The rolling distance measuring tool adopts LCD digital screen, which makes the measurement results easy to read, clear and intuitive.5. [Versatile Use] The digital distance ruler adopts rolling design, easy to operate, supports switching display units, highly practical. Suitable for machinery, industrial processes, and laboratories.Specification:Item Type: Electronic Rolling RulerMaterial: ABSWorking Temperature: -10-50Cruise Power: Uninterrupted Working for 6 HoursMeasurement Range: 0-199.999mStandby Time: 300 DaysCharging Port: Type CBattery: 1 x Lithium Polymer Battery (Built in)Capacity: 260mAh (Single Battery Capacity).Package List:1 x Electronic Rolling Ruler1 x Data Cable