Laser meter with case, class ii laser, wavelength 650 nanometers, accuracy ±2 mm, measurement range 0.05 - 50 m. operates with 2 aaa batteries (included). operating temperature 0°c 40°c. measurement unit options in m, inches, feet and delay measurement. continuous measurement function, area, volume, angle, pythagorean theorem, addition and subtraction, addition/subtraction of area and volume. maximum and minimum notice, backlit display and key tone, maximum storage 99 units. automatic laser shut-off after 20 seconds, device shut-off after 150 seconds. measurements 5.2 x 2.4 x 12.3 cm