Features:_x000D_ _x000D_ It can convert ambient sound into electrical signals, process data and displays results on LCD. _x000D_ The product is compact and light weight, convenient to carry. _x000D_ White backlight, LCD digital display, easy to read. _x000D_ Equipped with sponge ball to filter-out unwanted signals. _x000D_ Great tool for monitoring noise levels in hotels, conference halls, home theater, hospitals, and any other noise sensitive environments. _x000D_ _x000D_ Specifications:_x000D_ Color: White_x000D_ Measuring Range: 30 ~ 130dB_x000D_ Accuracy: 1.5dB_x000D_ Resolution: 0.1dB_x000D_ Frequency Range: 31.5HZ ~ 8KHZ_x000D_ Frequency Weighting: A_x000D_ Sampling Frequency: 2 times/sec_x000D_ Digital Display: 4 digits_x000D_ Microphone: 1/2" Condenser microphone_x000D_ Operating Temperature: 0~40C (32 ~ 104 F)_x000D_ Operating Humidity: 10 ~ 80%RH_x000D_ Storage Temperature: -10~60C (14 ~ 140 F)_x000D_ Storage Humidity: 10-70%RH_x000D_ Power Supply: 3 x 1.5V AAA Battery (included)_x000D_ Size: Approx. 14.2 x 5 x 2.5cm / 5.59 x 1.97 x 0.98inch_x000D_ Weight: Approx. 148g_x000D_ _x000D_ Package Included:_x000D_ 1 x Sound Level Meter_x000D_ 3 x 1.5V AAA Battery_x000D_ 1 x Manual