INSIZE Electronic Digital Protractor & Level Features include... 0-360° Range (90° x 4) 0.05° Resolution Used as level and slope meter Magnetic Bottom with V-Groove for shafts Dimensions are as follows... 5.906" Long 2.362" Tall 1.299" Wide Buttons include... On/Off Absolute / Incremental Keep the reading Buzzer Alarm in/ft, %, mm/m conversion Backlight