Frequency range:  31.5Hz - 8KHz

   Measuring range: （28）30dB - 130dB

   Frequency Weighting:  A/C

   Microphone:  1/2 inch polarization capacitance microphone

   Digital Display:  4digit LCD

   Resolution:  0.1 dB

   Display Update: 2 times/sec

   Time Weighting:

        FAST      125ms

        SLOW     1 second

   Measuring ranges:

        Range 1:  （28）30dB - 70dB

        Range 2:    60dB - 100dB

        Range 3:    90dB - 130dB

   Accuracy:  ±1.5dB (reference conditions 94dB@1kHz)

   Dynamic range:  40dB

   Overflow indicator:   “OVER” will be displayed when over range,

   display “OL” when overflow the upper range more than 5dB.

    “UNDER” will be displayed when under range, display “LO”

   when under the lower range more than 5dB or under 28dB.

   MAX hold:  “MAX”

   Data storage:  60000 samples

   Interface:  USB interface

   Power:  One 9V battery

   Power Life: Approximately 70 hours

   Operation Environment: 0 - 40°C（32 to 104°F）

                                          10 - 75%RH

   Storage Environment:  -10 - 50°C（14 - 122°F）

                                        10 - 80%RH

   Dimensions:  185（L）*65（W）*35（H）mm

   Weight:  155g (including battery)

   Accessories: 9V battery, instruction manual, USB cable and driver disk