Check the listing for details. NEW GENERAL TOOLS 824 MINI Digital PROTRACTOR Angle Finder,2-5/32" Size LCD. Condition: New. Listed at 30.99 USD. PROTRACTOR GENERAL TOOLS 824 FACTORY SEALED NEW PRODUCT OVERVIEWAccurately sets blade angles on lathes, miter, band, table, chop and circular saws, easily adjust the saw blade angles to any angle you want, strong magnets hidden inside the bottom of the device securely attaches the 824 to saw blades, displayed value always shows right side up, whether the unit is upside down or not, arrow sign indicates the rotating direction, 0.1 resolution with 180 measuring range. Power source (2) CR2032 batteries included. Description du français:DETECTEUR D ANGLE NUMERIQUE Descripción español:DETECTOR DIGITAL DE ANGULOS Product DetailsAccuracy:0.01 degDimensions:2.15 in L x 2.15 in W x 0.6 in DDisplay Type:DigitalIncludes:(2) CR2032 Non-Rechargeable Lithium-Ion BatteriesMeasuring Range:0 to 180 degPower Source:Lithium-Ion BatteryResolution:0.01 degType:MiniFeaturesMeasures the angle of any surface with respect to the horizontal (absolute mode) or a reference surface (relative mode)Any reading in degrees can be converted to a percentage to indicate slopeWhen the protractor is inverted, the display automatically flips 180 deg to show readings right side upMeasurement HOLD button saves readings for convenient viewing laterThree-minute auto power-off trigger extends battery lifeStrong internal magnets securely attach the protractor to saw blades