Portable Sound Level Meter: A small and handy tool ideal for noise monitoring, home theater setup, health and safety compliance, vehicle noise testing, etc. HD Digital LCD Display: Large, readable LCD screen with backlight, which can quickly display the measurement, clearly and easily readable. Power Source: 3 AAA batteries, low battery indicator, automatic shutdown without operation after 10 minutes, convenient and energy saving. Multi-function: Measuring range from 30 to 130 dBA. Maximum/Minimum/Data Hold function - Automatic shutdown - Battery indicator: directly check the remaining battery. Widely Uses: Designed to meet the measurement requirements of sound quality control in various environments. Ideal for testing music recording, neighbor noise complaints, industrial settings, office settings, speech therapy, and more. Accurate Measurements. Our lever sound level meter can read between 30 and 130 dBA, while reducing the effects of wind noise to produce more accurate readings. The decibel meter provides measurements of +/- 1.5 dBA, providing some of the most accurate results. Multi-function: Max/min/auto power off data hold function; Battery indicator: Directly check the remaining battery. Microphone with wind shield. 1/2" electret condenser microphone, sensitively detects sound changes. Features: Range: 30-130 dBA. Accuracy: ± 1.5 dB. Resolution: 0.1 dB - Frequency Range: 31.5 Hz ~ 8 kHz. Sampling Rate: 2 times/sec. Microphone: 1.27 cm Electret Condenser Microphone. HD Digital LCD Display. Large and readable LCD display with backlight, which can quickly display the measurement, clearly and easily to read. Multiple Uses: Designed to meet the measurement requirements of sound quality control in various environments. Ideal for testing music recording, neighbor noise complaints, industrial settings, office settings, voice therapy and more. 1. Remove the windproof ball. How to open the battery door: 2. Push the sound level meter out of the protective case. How to open the battery door: 3. Install 3 x 1.5V AAA batteries. How to open the battery door: Assemble the device. Turn on the sound level meter.