Feature: 1. HIGH PRECISE METER: This distance tester has millimeter level accuracy with the measurement range of 0.05 to 40m. 2. DUAL PHOTOSENSITIVE HOLES: The meter has dual photosensitive holes, enhances optical compensation, more accurate. 3. LARGE STORAGE: There are 99 groups of data can be saved, and you can view and compare them at any time. 4. OPTICAL FOCUSING LENS: The meter adopts aspherical optical focusing lens, enhances reflected light reception. 5. EXCELLENT COMPONENTS: Adopt high strength ABS plastic shell for better protection of the body, using excellent laser components, the measurement is stable, fast, low power consumption. Specification: Item Type: Laser Distance Meter Material: ABS Battery: 2 x 1.5V AAA battery (not included) Purpose: Distance detection Basic Parameters: Distance Measurement Range: 0.05-40m Distance Measurement Accuracy: ±(2mm+dx1/10000) Laser Type Class: Class 2 630-670nm, <1mW. Package List: 1 x Laser Distance Meter1 x Manual Note: It is forbidden to store the instrument in a high temperature and high humidity environment for a long time.