40mtr/131ft/1575inch Laser Distance Meter 40 meter Laser Range Finder Distance Measuring Meter 40 meter with Backlight Large LCD + Waterproof + Dustproof Digital Diastimeter Continuous Measurement Device for Volume Area Min Max Add Subtract Pythagorean Measure Distance Tape Vernier Caliper Micrometer Angle Finder with Bubble Level Tool. Laser Distance Meter is a lighter, faster and more accurate measuring tool. It provides laser precision technology and real-time measurement mode. It can also be used instantly and reliably to measure the distance of up to 100 meter while eliminates the tedious work of traditional measuring tools. With this tool, people can measure in seconds. Wide Application & Practicality: It can be used in electric power, water conservancy, communications, environment, construction, geological, police, fire, explosion, navigation, railways, anti-terrorism / military, agriculture, forestry, real estate and other professional fields and can also be used for daily leisure / outdoor sports, such as field investigation, indoor decoration, warehousing and logistics, DIY, children's height measurement. Advantages: > Safe laser beam. The safety of using the 635nm laser beam will not do harm to eyes, please rest assured that. > Precision measurement technique: The level of bubble is up to 2mm! (Note: please keep the bubbles in the center of the air when measuring for data accuracy.) > This measurement function: There are fast measurement of distance or height with a key operation and indirect measurement with Pythagorean Theorem system. In addition, Automatic calculation of area and volume with high accuracy and measurement of continuous distance are contained. You can also switch among meters (m), inches (in), and feet (feet). > This screen with large LCD display as well as backlight, can improve visibility in low light conditions. It also includes low battery indicator and large LCD display with backlight. This laser measure will save power without any operation. It will be in a black screen automatically after 35 seconds and shutdown after 3 minutes. > AAA battery provides more than 5000 measurements! > Wide Application & Practicality: It can be used in electric power, water conservancy, communications, environment, construction, geological, police, fire, explosion, navigation, railways, anti-terrorism / military, agriculture, forestry, real estate and other professional fields and can also be used for daily leisure / outdoor sports, such as field investigation, indoor decoration, warehousing and logistics, DIY, children's height measurement. Note: Since the intense sunlight will weaken the laser energy, which may affect the accuracy and range of measurement. We suggest that you’d better do not use it in the intense sunlight. Features: Quick measurement of distance, area and volume Automatic calculation of area and volume Indirect measurement by Pythagorean Theorem Continuous measurement Min/Max distance tracking Easy addition/subtraction of measurement Switchable among meter (m), inch (in), feet (ft) Easy targeting with bright laser pointer Large LCD with back light Display illumination and multi-line display Auto correction and error report technology Low battery indication Auto / manual power off function Specifications Accuracy: ±2mm (±0.08 inch) Laser class: Class II Laser type: 635nm, <1mW Operating temperature: 0 ~ 40 °C (32 ~ 104 °F) Store temperature: -20 ~ 60 °C (-4 ~ 140 °F) Auto power off: after 150 secs Auto cut off laser: after 20 secs Dimension: approx. 118 x 54 x 28 mm (4.65 x 2.13 x 1.10 inch) Weight: approx. 200 g Memories: 20 Data Memories Battery: 2x AAA Battery (included) Package: 1x Laser Distance Meter 1 x Carry Case 1 x Battery Set (2xAAA) 1 x User Manual