The LCD Noise Detector is a handy little tool for noise pollution testing, home theater setups, health and safety compliance, vehicle noise testing, and more. The Decibel Meter features a larger, clear LCD display and fast backlighting for fast, easy-to-read measurements. The measurement range is 30-130 dBA. The Decibel noise tester is made of ABS plastic, which is environmentally friendly, durable, sturdy, reusable and safe to use..LCD noise detector powered by 3 x 1.5V batteries (not included). Decibel Data Logger can be used to measure sound levels around factories, workshops, schools, homes, offices, roads, audio, etc. The sound level sound level has a max/min/data hold function..The LCD noise detector has automatic shutdown and low battery indication..You can also check the remaining battery directly.< /p>