Multiple measurement methods: Laser Distance Measure supports the following measurements: single distance measurement, continuous measurement, area measurement, volume measurement, auto height measurement, auto level measurement and 3 Pythagorean measurement. Compared with single angle measurement and traditional , Dual Angle Measurement can measure the front and back, left and right angles more conveniently and accurately.The tool can measure from three different reference points (the front, the middle and the rear of the device), making it easy to measure in different scenarios. Manually delete unwanted dataChange unit among M/In/Ft freely according to your needs. The default unit is meter.Users can use the addition and subtraction function when measuring the length, area and volume. TRIPLE POWER METHODS: This laser measure employed the included rechargeable 2 AA NiMH battery. And it can also be used with 2 AA alkaline batteries(not included). In addition, this laser distance meter