2014 New MASTECH Laser rangefinder 80m Distance Meter MS6418 Electronic foot laser ruler Infrared measuring instrument Introduction: This 2014 new Laser Distance Meter Mastech MS6418 employs laser technology to measure distance area and volume accurately quickly and conveniently. It has a wide measuring range 80m (3149in / 262ft) and particularly high accuracy 2mm. In addition the meter has kinds of pre-designed measuring mode to get unilateral distance of triangle by ways of Pythagorean proposition. It also has Add and Subtract Measurement function. Features: secondary injection rubber sleeve and thin film soft keys make the instrument more durable and comfortable Wide measuring range up to 80m(3149in/262ft) With a spirit level makes the measurement data more accurate 4 rows of data showed at the same time contrast conveniently Quick and stable measurement of distance area and volume Pythagorean proposition indirect measurement Continuous measurement Add and Subtract Measurement Switchable among metre(m) inch (in) feet (ft) Min/Max value display Data storage function Backlight display Automatic shutdown Specifications: Distance measurement range: 80m (3149in/262ft) Distance measurement precision: 2mm Measurement unit options: mm/in/ft Max storage: 99 units Laser Lever: Class II Laser type: 635nm <1mW Auto cut off laser: 20 secs Auto power off:150 secs Operating temperature: 0 ~ 40 C (32 ~ 104 F) Store temperature: -20 ~ 60 C (-4 ~ 140 F) Storage humidity: Rh85% Power supply: 3 x 1.5V AAA batteries (not Included in package) Dimension: approx. 118 x 54 x 28 mm (4.65 x 2.13 x 1.10 inch) Weight: approx. 180 g (6.35 oz) Package list: 1 x Laser Distance Meter 1 x portable bag 1 x Instruction manual 1 x gift box for we\'ll send the item via Air Mail there has no method to send the battery of the item. you need to buy the battery in your local store.