This tool is invaluable for many angle measuring and transfer applications. It is simplicity itself to operate. The main stock houses the electronics that provide a very clear detailed LCD display. The body incorporates a levelling vial and the pivoting arm. When the arm is moved the angle it makes with the base is displayed to the nearest 0.5°. The measuring range is 0 - 220°. The vial allows variations from the vertical and the horizontal to be accurately measured. Other features include a lock function to prevent the last measurement being lost, a low battery indicator and automatic shut off function. The pivot arm has a built in ruler 0 - 320mm. Full instructions included.