This meter is featured with wide measuring range (30-130dB). It's portable and easy to use and handy instrument for sound quality control in factory, office, home, school and construction site.

Features:
Wide measuring range: 30-130dB.
Fast/Slow response and Maximum hold function.
Equipped with sponge ball.
Auto power-off after working 2 minutes(power on normally); if you press the switch button for 3s, it will not power off unless you press the button again.
AC/DC analog signal output.
Power supply: USB interface or 4 * AA batteries.
Portable, easy to use and handy instrument for sound quality control in factory, office, home, school and construction site.

Specifications:
Measuring Range: 30-130dBA or 35-130dBC
Accuracy: ±1.5dB
Resolution: 0.1dB
Frequency Range: 31.5Hz to 8.5KHz
Level Range: 30~80dB, 40~90dB, 50~100dB, 60~110dB, 70~120dB, 80~130dB, 30~130dB
Linearity Weighting: 50dB
Frequency Weighting: A/C 
Digital Display: 4 Digits
Sample Rate: 2 Times/sec
MAX Hold: "MAX"
Over Indication: OVER/UNDER
Time Weight: FAST/SLOW
Microphone: 1/2inch Electret Condenser Microphone
Power Supply: 4 * 1.5V AA Batteries(not included) or USB 5V 100mA
Operation Environment: 0-40 ? 10-80%RH
Storage Environment: -10-50? 10-80%RH
Dimension: 230 * 70 * 35mm / 9 * 2.75 * 1.38in (L * W * H)
Weight: 269g / 9.48oz
Package Size: 29 * 14 * 6.5cm / 11.4 * 5.5 * 2.56in (L * W * H)
Package Weight: 459g / 16.19oz

Package List:
1 * Sound Level Meter
1 * Sponge Ball
1 * USB Cable
1 * CD
1 * User Manual (English)