1Optical observing system: laser technology, the object to be measured is clear like that in front of you, the measurement is quick and accurate, and the error is small. 2Stable performance: high performance technical support, stable measurement data, wear resistance and long service life. 3Ergonomic design that make it easier to operate, comfortable to hold. 4Shell is made from engineering plastic, waterproof and dust-proof and fall off. 5Widely used in mountaineering camping, golf course, power, construction surveying, etc