Decibel Meter: The sound level meter simulates the frequency characteristics of low-intensity human ear noise and is suitable for detecting ambient noise. The sound level meter simulates the frequency characteristics of high-intensity human ear noise and is suitable for analyzing the sound pressure of motors and machines. The digital display is a 4-digit LCD screen with a resolution of 0.1 dB. Accurate measurement: The decibel meter uses a highly sensitive and accurate condenser microphone to capture sound. Sound level meter with LCD display. Measuring range: 30 to 130 dB. Accuracy: 1.5 dB EASY TO USE AND VERSATILE: This portable sound level meter has non-slip sides and is comfortable to hold. The decibel meter is battery powered (not included) and has an automatic shutdown function to extend battery life. The screen also displays the low battery status to ensure users replace the battery timely. Digital LCD Display: The decibel meter is a 4-digit LCD display with a resolution of 0.1 dB. The large backlit digital LCD display makes the readings clearer in dark places. When the battery is low, the LCD screen will display a low voltage icon, indicating that the battery is low and the battery needs to be replaced. Package Contents: The sound level meter will automatically turn off if no operation is performed for 10 minutes. Specification: Power supply: 3 x 1.5V AAA batteries. (not included) Dimensions: 150 x 50 x 30 mm. 1 x sound level meter. Note: The data are all measured manually, please allow 1-3 cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.