Empire 24 True Blue Digital Box Level w/Case e105.24 FEATURES: 4 Power Save Modes: 15 min; 30 min; 1 hr and 2 hr. Tilt Indicator. Digital Display Sync-able to Vial. Precision Milled Edges. Surface Grippers. High Contrast e-BAND Solid Block Acrylic Vials. Protective Case Included (24 and longer models). 2 (AA) batteries included. Limited lifetime warranty on frame and vials. 1 year warranty on electronics. SPECIFICATIONS: Auto-CalibratedDigital readout immediately ready to measure accurately when powered on7 Measuring ModesPrecision: Degree; Tenths (1.1); Degree; Hundredths (1.15); mm/M (104.17 mm/M); Percentage (2%)Rough-InDegree; (1); in/ft.; Fractional (1/4 in/ft.); in/ft.; Decimal (.25 in/ft)Inspect ModeAllows for repeat inspection of grade measurements; Ideal for ADA rampsIP65 RatedDust and water protectedAudio IndicatorContinuous tone when in level; Progressive beeps as the user approaches level or plumb Empire e105 Digital 24" Box Level w/Case E105.24