Features:
It is designed according to following standards, International Electrician Committee Standard: IEC 651 TYPE 2 & ANSI 1.4 TYPE 2.
With modern compact and portable appearance design.
Accuracy up to -1.5dB.
Maximum value holding function to lock up the maximum reading.
Large LCD screen with digits reading.
Equipped with a sponge ball.
Auto power off design for energy saving.
Auto backlight display.
Portable, easy-to-use and handy instrument for sound quality control in factory, traffic, family, and audio system.

Specifications:
Measuring range: 30-130dBA
Accuracy: -1.5dB
Frequency range: 31.5Hz to 8.5KHz
Frequency weighting: A
Digital display: 4digits
Resolution: 0.1dB
Sample rate: 2 times/second
Microphone: 1/2 inch electret condenser microphone
Max hold: MAX
Power supply: 9V battery (the battery is not included)
Power life: About 30 hours (alkaline battery)
Operating condition: 0-40 degree 10-80%RH
Storage condition: -10-- 60 degree 10-70%RH
Product weight: 105g
Package weight: 130g
Product size: 14.2 * 5.3 * 3.5cm
Package size: 15.2 * 6.0 * 4.2cm

Package list:
1 * Sound Level Meter
1 * Sponge Ball
1 * User Manual