Feature: 1. HIGH ACCURACY AND UNIT SWITCHABLE: The measurement unit can be switched between mm, in, ft, using laser accurate technology, accuracy up to ±1.5mm(±0.06in) 2. VARIOUS MEASUREMENT FUNCTIONS: Support area volume calculation, hook law measurement, addition and subtraction measurement, maximum and minimum value measurement, continuous measurement 3. RUGGED DESIGN: Aluminum alloy housing, IP54 waterproof rating and dust resistance to maximize the protection of the laser rangefinder 4. LCD BACKLIGHT AND MUTE SETTINGS: The large backlit screen gives you better visibility in dark areas; The mute setting lets you turn the measurement beep on or off at will, and is suitable for use in quiet places such as libraries and classrooms 5. WIDE APPLICATION: Laser rangefinder is the ideal choice for home, construction and industry, especially in large areas such as rooms, apartments, buildings, properties, factories, warehouses and so on Specification: Item Type: Laser Distance Meter Accuracy: ±1.5mm(±0.06in) Measurement Unit: Mm, in, ft Laser Type: Class 2 635nm, <1mW Area Volume Calculation: Supported Pythagorean Law Measurement: Supported Plus Minus Measurement: Supported Maximum Min Measurement: Supported Continuous Measurement: Supported Display Backlight: Supported Multi Line Display: Supported Buzzer Tip: Yes Water Proof and Dust Proof: IP54 Battery: 1 x 702020 polymer lithium battery 200mAh Battery Life: About 4000 single measurements Operating Temperature: 0℃ to 40℃(32℉ to 104℉) Storage Temperature: -10℃ to 50℃(14℉ to 122℉). Package List: 1 x Laser Rangefinder1 x Charging Cable1 x Lanyard1 x User Manual