Frequency Rating: dBA Reading ranges (dB): 30 ~ 130 Frequency (Hz): 31.5Hz - 8kHz Accuracy (dBA): +/-1.5 Min/Max & Hold Function Display Resolution: 0.1 dB Response Time Fast: 125 ms/Slow: 1000 ms Auto Power Off (min): 5 minutes Overload Indication Green LCD backlight Battery Type: 3XAAA Display: 3.5 digits