Capable of measuring from 0.2-40m and accurately measure small distances up to within 1/16-in (1.5 mm). Manufactured as a waterproof, dustproof and crashproof tool. Application: Interior Design, Interior Decoration, Exhibition booth construction, real estate, construction, engineering, architecture, masonry, carpentry, renovations, anything that needs precise measurement. Features: Single distance measurement Continuous measurement Indirect measurement Area measurement Max/Mix measurement Soft rubber Buttons 5000 times battery life Pythagorean 1 & Pythagorean 2 function Add/Subtraction function Auto turn off laser in 30s Auto turn off when device is idle for 3 mins Specifications: Measurement range: 0.2~40m Measurement accuracy: ±1.5mm Measuring units: meter (m) Laser class: class 2 Laser type: 650nm,≤1mw Memory: 20 data (recall the last 20 data) Operating environment: 0~40°C Storage environment: -10~60°C Battery: 2 x AAA (no included in the set) Size: 120 x 48 x 27mm Weight: 120g Set Includes: 1 x 40m laser distance meter 1 x Removable Clip 1 x English User Manual