60cm , Digital display, automatically turning around when working overhead; “Hold”-button to store a measured value; any angle can be taken as reference angle (set as zero point), two different beeps when approaching Two different beeps when approaching level/plumb position from left or right Accuracy: Vials: normal position 0,5mm/m, inverted 0,75 mm/m Electronic inclination module: 0º and 90º: 0,05º, 1º – 89º: 0,2º; Display in º, %, mm/m and inch/ft