General Description: Ahlsen digital calipers are versatile measuring tools, ideal for measuring outside diameter, inside diameter, pitch, and depth. Thanks to their ergonomic design and large LCD screen, they are easy to use and read, even for beginners. Technical Specifications: Measuring range: 0-150 mm / 6 inches; Resolution: 0.1 mm / 0.01 inch; Accuracy: ± 0.2 mm; Operating temperature: 0-40 °C. Applications: These digital calipers are perfect for everyday use in various environments such as schools, homes, laboratories, and factories. They allow for precise and rapid measurement, thus facilitating DIY and engineering tasks. Other information: Zero function for recalibrating the caliper at any time; Millimeter/inch conversion to suit user preferences; On/off button function and automatic shut-off after 5 to 8 minutes to save battery; Made of lightweight and durable carbon fiber composite material; Non-sharp edge to prevent injury; Built-in battery indicator; Large high-definition LCD screen with large fonts for easy reading