Basic multi-function experience. Accuracy. Backlight support. Anti-drop shell. 20 sets of data storage. Long battery life. Bubble device horizontal. Surface volume measurement. Pythagorean measurement. Continuous measurement mode. Model: 40 meters. Type: portable laser rangefinder. Measuring range: 0.03-40 (m). Measurement accuracy: 3 (mm). Scope: interior decoration technical decoration. Size: 118 * 54 * 27mm. Battery type: 1.5 V * 2. Temperature range: 0-40. Accuracy: 0.001 M. dust and splash proof: IP54. Maximum storage: 20. Material: ABS + silicone. Maximum storage: 20. Maximum / Minimum: 40 / 0.03. Net weight: 110g. Specifications: 40 M. Measuring accuracy: 3.0 mm. Measuring range: 0.03-40 / 60/80/100 meters. Continuous measurement support. Measurement reference: front / rear reference. Support area measurement. Unit of measurement: m meter / ft feet / in inches. Volume measurement support. Historical measurement records: 20 groups. Support display lighting. Battery type: AAA 1.5V 2 sections.（not contain batteries） Delivery color will be based on the first main picture. 1. Range: The range will change according to the different versions of the model, the actual range is indicated in the outer packaging of the machine. Accuracy: it can reach the nominal range under good measuring conditions (good measuring surface, ambient temperature, interior lighting). Under bad measurement condition, such as excessive light, weak reflection on the surface of the measured object, or excessive temperature difference, the error will increase. Tips: Please use cutting board or better reflective surface when sunlight or target is not reflective.