Pyle PSPL05R Digital Sound Level Meter with Recording Function This unit confirms to the IEC61672-1 class 2 for sound meters Accuracy: +/- 1.4 dB Frequency range: 31.5 Hz - 8 kHz 1/2"" Electret Condenser Microphone MAX & MIN Measurements Over Range Display Under Range Display A & C weighting Fast & Slow response Digital LCD Display with a resolution of 0.1 db Bar Graph Function Records up to 50 sets of data Sold as : Unit