Auto Ranging   Frequency weighting: A/C   Fast/Slow time weighting selection   Max Hold function   High Accuracy   Bar graph display   AC/DC function   White Backlight   Over / Under indicator   Time and date display   Auto-off function setup   Low Battery Alert   Tripod Mount (Tripod not included   with USB cable for power supply   CE Certified & RoHS Compliant              Standard applied: IEC651 type 2, ANSI S1.4 type 2   Calibration sound source: 94dB @ 1kHz   Measurement range: 30~130dBA   Accuracy: ±1.5dB(reference sound pressure standard, 94dB@1KHz)   Frequency response: 31.5~8.5KHz   Resolution: 0.1dB   Measurement weighting: A/C   Analogy bar graph: 2dB/1 Bar graph increment   Display update time: 2 times/second (FAST), 1 time/second (SLOW)   AC signal output: 4Vrms/ full barograph, output impedance is approx 600 ohm   DC signal output: 33mV/dB   Sampling rate: FAST (125ms) / SLOW (1s)   Dynamic characteristic: FAST (high speed) / SLOW (low speed)   Power supply: 4 x AA Size 1.5V battery or USB power cable   Item Weight: 7.4 ounces   Product Dimension: 9 x 2.5 x 1.5 inches   Weight: 13.6 ounces   Dimension: 9.6 x 4 x 2 inches                                      Comes With                                       1 x Sound Level Meter                                   1 x English User Manual                               1 x AC/DC line                               1 x USB Power Cable                               4 x AA Battery                                   1 x Carrying Pouch