?< - Color: Light grey?- ABS material housing?- 1.5" backlit LCD display?- Manual or automatic sound level range?- Frequency range: 31.5Hz to 8.5KHz?- Measuring level: 30~130dBA?- Accuracy: +/- 1.5dB?- Sampling rate: 2 times/sec?- Easy operation?- Powered by 1 x 9V battery (not included)?- Comes with English user manual?????????????????????????????????????????????????????????????????????????????????????????????????