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 Ruler Material: ABS Working Temperature: -10℃-50℃ Cruise Power: Uninterrupted Working for 6 Hours Measurement Range: 0-199.999m Standby Time: 300 Days Charging Port: Type C Battery: 1 x Lithium Polymer Battery (Built in) Capacity: 260mAh (Single Battery Capacity). Package List: 1 x Electronic Rolling Ruler 1 x Data Cable