1、Sound Level Meter: The sound level meter with a wide test range of 30-130dB also has ±1.5dB high accuracy and 31.5Hz-8.5KHz frequency response range. 2、Clear LCD Display: Equipped with 18in ultra large LCD screen, the digital sound meter enables clear display over the measurement result, easy to read. 3、Alarming Function: When alarming, the indicator light flashes with beep, the alarm time is 6s-120s adjustable, and the alarm sound has 3 level as well. 4、Wider Application: Supports convenient wall mount, this decibel tester is applicable to home, offices, clubs, classrooms, hotel, rooms and other places. 5、Easy in Operation: Powered by DC 5V 2A adapter, the noise level meter is very simple to use, just plug and play, which ensures higher work efficiency. Item Type: Sound Level Meter Measuring Range: 30~130dB Accuracy: ± 1.5dB, subject to standard sound source, 94dB at 1KHz. Frequency Response: 31.5Hz ~ 8.5KHz Frequency Weight: A Weight Response Time: Fast Microphone: 6mm condenser microphone. Digital Display: 3 Digits Resolution: 0.1dB at 30-99.9 or 1dB at 100-130. Alarm Prompt: Supported Alarm Output: Supported Storage Function: Not Supported Communication with Computer: Not Supported Display Screen: 18in Power Supply Mode: DC 5V 2A power adapter, DC 5.5 x 2.5 interface. Working Temperature and Humidity: 0 ~ 40℃, 10%~80%RH Storage Temperature and Humidity: -10 ~ 60℃, 10%~70%RH 1 x Sound Level Meter 1 x Adapter