This multi-functional laser measurement meet the needs of people with different usage scenarios like construction, remodelling, renovation and room decor. Features: Fast and Accurate: Features Class II laser with extreme accuracy within 2mm and up to 100m/328ft measuring distance. Equipped with PC optical curved lens to ensure quick response time in 0.25s. (MAX OUTPUT<1mW). Multiple Measurement Modes: Supports distance, area, volume and pythagorean modes. Continuous measurement function allows the addition and subtraction of numerous measurements to get simple and easy calculations, and switchable units among ft/m/in for convenient conversion. Electronic Angle Sensor: The built-in electronic angle sensor can display the angle in real time to help reduce the error. 100 Groups of Data Storage: 100 sets of data storage memory, anytime and anywhere to browse query records. Portable and High quality: A small and light tool with a lanyard and a handy package are perfect to carry around and it is also resistant to dust, splashes and impacts. Laser Distance Meters: Digital laser range measure is more precise for home, construction, project, remodeling and industries, especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses, etc. Specifications: Model: DC40, DC60, DC80, DC100 (Optional) Material: ABS Measuring Range: DC40: 0.05~40m DC60: 0.05~60m DC80: 0.05~80m DC100: 0.05~100m Accuracy: 2mm Unit of Distance: m, ft, in Unit of Area: m, ft, in Single Measurement: Yes Continuous Measurement (Max/Min): Yes Area/Volume/Pythagoras: Yes Plus and Minus: Yes Unit Conversion: Yes Data Clear: Yes Error Code: Yes Battery Power Indication: Yes Measuring Reference: Yes Angle Measurement: Yes Single Measurement Time: 0.25s Laser Auto Switch Off: 30s Instrument Auto Switch Off: 180s Historical Data Review: 100 sets Laser Type: 620~690nm Laser Class: Class II, 1mW Operating Temperature: 0~40 Storage Temperature: -20~65 Storage Humidity: 20~80%RH Power Supply: 2 * 1.5V AAA batteries Working Time: 5000 time Item Size: 112 * 45 * 25.5mm / 4.41 * 1.77 * 1.00in Item Weight: 82g / 2.89oz Package Weight: 170g / 5.99oz Package Size: 17 * 11.5 * 4.5cm / 6.69 * 4.53 * 1.77in Package List: 1 * Laser Distance Meter 1 * Hand Strap 2 * 1.5V AAA Batteries 1 * User Manual (English)