Features: MAX & MIN measurements Over range display Under range display A & C weighting FAST & SLOW response Digit LCD display with backlight Readings memories Specifications: Model: DT-815 Standard applied: IEC61672-1 Type 2, ANSI S1.4 Type2 Accuracy: +/- 1.4dB Frequency: 31.5HZ to 8KHZ Dynamic: 50dB Level: Low: 30dB to 80dB; Med: 50dB to 100dB; High: 80dB to 130dB; Auto: 30dB to 130dB Time weighting: FAST(125mS), SLOW(1s) Microphone: 1/2 inch electret condenser microphone Resolution: 0.1dB Reading display update: 2 times/sec Bargraph display update: 2 times/sec Package includes: 1 * DT-815 digital multimeter 1 * Carrying case