Quantity: One piece The practical tape measure comes with a 180mAh lithium battery and a USB charging port. A full charge can be used 3000 times. You save money and time by not having to buy batteries. Easy to read: The tape measure has its own LED display, and the measurement value will be displayed on the LED display. The locking function of the tape measure also makes it easier to read the data from the tape measure. Easy to use: Small and convenient. One-key operation, no heavy key operation required. The tape measure is measured in inches and centimeters, and the outer layer is protected by soft silicone. Wide range of applications: The laser tape measure can be used in interior decoration, construction, and industry, especially for measuring large areas and volumes in rooms, apartments, buildings, etc. Customer service: We strive to provide you with quality and convenient service. If you have any questions about our products, please feel free to contact us, we will give you a satisfactory answer.Good quality product