Digital Sound Level Meter 30 to 130 dB dB Range Frequency Range 31.5 Hz to 8 kHz A and C Frequency Weighting Accuracy +/-1.5 dB Resolution 0.1 dB Display Digital LCD with Bar Graph Fast/Slow Response Time Relay Output Interface Built-In Data Logger Impedance 350 ohm +/-20 Percent @ 23 Degrees C Includes (4) 1.5V Batteries Instructions Manufacturers Warranty Length 1 yr