This laser distance meter is of mini size and multiple purposes. It can measure distance, area, volume and Pythagorean quickly. Digital LCD display with backlight makes it easy to read. It also supports datum mark switching according to the measurement requirements. Battery operated, mini and lightweight, it's easy to carry. Features: Laser Measure with Horizontal Bubble -- High precision laser range finder with fast measurement; 100m (328ft) long measuring range meets diverse needs. Dual horizontal bubbles provide more precise measurement compared to one bubble. Multifunctional Measurement -- Quick measurement of distance, area, volume and Pythagorean; supports unit switching: m/ ft/ ft'/ in/ in"; supports continuous/ maximum/ minimum measurement, addition/ subtraction; supports 99 history records. LCD Display & Mute Mode -- Digital LCD screen with backlight enhances the reading experience; the laser beam, backlight and instrument will automatically shut down to save power. The beep can be turned off when using in library, classroom and other quite places. Datum Mark & Countdown -- Supports front, back or settable (a, b) reference point according to the measurement requirements, easy to switch. Supports countdown function for more humanized use. Compact & Portable -- Mini and lightweight, comes with a wrist strap and a pouch for convenient use and easy portability. 2 AAA batteries powered, easy to install and replace batteries, with low battery prompt. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black Material: ABS Screen: LCD with Backlight Measuring Range: 100m (328ft) Accuracy: Level 2 Measuring Accuracy: 1.5mm Unit: m/ ft/ ft'/ in/ in" Measurement: Distance/ Area/ Volume/ Pythagorean Reference Point: Front/ Back/ Settable (a, b) Addition/ Subtraction Function: Yes Continuous/ Max./ Min. Measurement: Yes Data Storage: 99 History Records Countdown: Yes Beep: Yes Laser Type: Class II, 630-670nm, 1mW Waterproof Level: IP40 Laser Beam Auto off Time: about 30s Instrument Auto off Time: about 3min Power Supply: 2 * 1.5V AAA Battery Item Size: 113 * 50 * 26mm / 4.45 * 1.97 * 1.02in Item Weight (without battery): 83g / 2.92oz Package Size: 15 * 8 * 6cm / 5.91 * 3.15 * 2.36in Package Weight: 151g / 5.32oz Package List: 1 * Laser Range Finder 2 * 1.5V AAA Batteries 1 * Wrist Strap 1 * Pouch 1 * User Manual (English)