Portable sound meter: a handy gadget, very suitable for noise monitoring, home theater settings, health and safety compliance, vehicle noise testing, etc. High-definition digital LCD screen: large size, clear backlit LCD screen, can quickly display the measured value, clear and easy to read. Power supply: 3 AAA batteries (included), low battery indicator, 10 minutes automatic shutdown without operation, convenient to save energy. Versatile: The measurement range is 30-130 dBA. Maximum value / minimum value / data hold function - Auto power off - Battery power indicator: directly check the remaining power. Wide range of uses: designed to meet control requirements and measuring sound quality in various environments. It is very suitable for testing music recording, noise complaints from neighbors, industrial environment, office environment, voice therapy, etc. Delivery quantity: 1 * decibel meter