Features:*High Quality Material: High-quality metaland plastic shell, sturdy and wear-resistant, rain-proof and durable, not easily damageds.*Easy to Use: This measuring instrument can help you quickly calculate the distance accurately and precisely by measuring the distance between two points on the map.*How to use the measuring instrument: When the wheel roll between two points on the map, the distance measuring pointer rotates accordingly. Record this value according to the corresponding scale and multiply it by the scale factor to get the actual distance between the two points. Compared with using a ruler The measured straight line distance is much more accurates.*Portable: The measuring instrument is small in size, lightweight and equipped with a mini metal handle, which is easy to carry and hold, making it convenient and portable.*Wide range of uses: This gauge is an ideal tool for outdoor camping, hiking, biking, and more.Notice:Actual color may be slightly different from the image due to different light effectPlease allow 1-3cm deviation due to manual measurementMaterial: Metal+ABS+AcrylicSize: 95*45*12mm