Backlighting illuminates display for taking measurements at night or in areas with low background light levels
Overrange indicator, auto data hold (when trigger released) and auto shut off
Includes battery and carrying case
Specifications: Range: Low: 35 to 100 dB; High: 65 to 135 dB Accuracy: ±1.5 dB Frequency: 31.5 Hz to 8 kHz Time Weighting: Fast/Slow (A & C) Power Supply: Single 9V battery Dimensions: 8.3 x 2.2 x 1.3" (210 x 55 x 32mm) Weight: 8.1 oz (230g)