Congratulations on the purchase of your Rxiry XR1800C laser rangefinder, a cost-effective professional rangefinder. This compact and lightweight laser is a flexible tool for your measurement needs. This rangefinder includes eight measurement modes, three target modes, RS232 serial data output and Rxiry measurement APP. Integrating laser sensor, inclination sensor and compass , it can measure horizontal distance, slope distance, vertical distance, inclination, calculate the 2D and 3D missing line routine and Azimuth Measurement Mode VD ML mode Calculate height difference of 2 points by measuring the distance of them. And the 2 points need be visible and the laser can reach them. HD ML mode Calculate the horiz0ntial distance of 2 points in the vertical direction. And the 2 points need be visible and the laser can reach them. HT mode Calculate height of 2 points, and first point should be visible and laser can reach it, for example, measure the height of buildings, water tower, high voltage line, electric pole. HD HT mode Calculate height of object by 3 points on it when top and bottle of object are invisible, it mean that the point can not be locked by lase, for example, measure the height of tree HD / SD mode Measure the horizontal distance and slop distance of target point in same time VD mode Measure the vertical distance and inclination of target point SPD mode Indicate the speed of moving object GPS mode Indicate the location of the rangefinder
