Features ± 2MM ACCURACY: This laser distance meter provides higher accuracy. It is easier to find the horizontal direction, and it can also carry out self calibration, and the measurement results are more accurate. FAST MEASUREMENT: The laser distance meter of laser head component can measure quickly and accurately in 0.5 seconds. WIDELY USED: The meter is an ideal choice for home decoration, especially for large areas such as apartments, buildings, real estate, factories, warehouses, buildings and industrial sectors. 99 DATA MEMORY: The meter supports 99 data records and callback functions, convenient for verification and calculation. EASY CARRYING: Comes with a small size and lightweight as well, you can easily take the meter for convenient use. Feature: 1. AUTOMATIC SHUTDOWN: The laser distance meter will automatically shut down after 150s with no operation to save power. Specification: Item Type: Laser Distance Meter Material: ABS Distance Measurement Accuracy: ± 2mm Measurement Unit: m, in, ft Continuous Measurement Function: Yes Area Volume Measurement: Yes Pythagory Measurement Function: Yes Addition and Subtraction Measurement Function: Yes Area Volume Plus or Minus: Yes Peak Size: Yes Self Calibration Function: Yes Laser Class: II Laser Type Level: 2 grade 630 to 670nm, less than 1mW Number of Stored Records: 99 Automatically cut off the laser for 20 seconds Automatic shutdown : 150 seconds Sound Prompt: Yes Storage Temperature Range: - 20 ℃ to 60 ℃ Operating Temperature Range: 0 ℃ to 40 ℃ Storage Humidity: 20% to 80% RH Power Supply Battery: 2 x AAA alkaline dry battery (shipped without battery) Package List: 1 x Laser Distance Meter 1 x Storage Bag  1 x Lanyard  1 x Accessory  1 x Manual  Package List 1 x Laser Distance Meter 1 x Storage Bag 1 x Lanyard 1 x Accessory 1 x Manual