| Measuring Range | 
            1.00 - 99,999 rpm | 
        
        
            | Resolution | 
            .01 from 0 - 100 
            .1 from 100 - 1,000 
            1 from 1000 - 99,999 | 
        
        
            | Accuracy | 
            ± 0.02% of reading or 0.01 digit (under 50) | 
        
        
            | Display | 
            5 - Digit LCD, 10mm high | 
        
        
            | Decimal Point | 
            Automatic | 
        
        
            | Memory System | 
            Maximum, minimum, and last reading (retained in memory for the life of the batteries) | 
        
        
            | Measurement System | 
            Visible LED light beam | 
        
        
            | Sensing Distance | 
            Up to 24 inches (60 cm) | 
        
        
            | Display Update Time | 
            0.5 seconds or one measuring | 
        
        
            | Auto Power Off | 
            After 30 seconds of non-use (minimum, maximum and last reading retained in memory) | 
        
        
            | Battery Life | 
            40 hours continuous use | 
        
        
            | Battery | 
            2 AA (1.5 V) or rechargeable | 
        
        
            | Weight | 
            6 ounces (170 grams) | 
        
        
            | Housing Material | 
            ABS Plastic housing with removable protective rubber shell | 
        
        
            | Operating Temperature | 
            32 to 122° F (0 to 50° C) | 
        
        
            | Storage Temperature | 
            -4 to 150° F (-20 to 70° C) | 
        
        
            | Accessories included | 
            10 Strips of 1/2 x 4 inch reflective tape | 
        
        
            | Warranty | 
            5 years | 
        
        
            | Calibration Certificate | 
            Included |