Pen Vibration Meter Acceleration Range 20.39g 200 m/sq sec 656 ft/sq sec Frequency Range (Hz) 10 to 1k Velocity 19.99cm/s 200mm/s 7.87in/s Bearing/Gear Check No +/-(5 Percent + 2 Digits) Accuracy Yes Data Hold Display LCD Special Features Interchangeable Test Pin Tip And Magnetic Base Water And Dust Resistant To IP65 (4) AAA Includes Four AAA Batteries Instructions Magnetic Base Pouch Case Test Pin Tip Manufacturers Warranty Length 1 yr