1. It is a perfect sound level meter for measuring noise levels in home, factories, offices, theaters and audio systems. 2.Digital Sound Level Meter measuring range: 30 ~ 130dBA; Precision: +/- 1.5 dB; Resolution: 0.1 db; Records Max / Min values all the time. 3.Large LCD display of Decibel Tester: has a large backlit screen with LCD display, allows the result to be easily read. 4.In rapid response: Measurements in dBA Frequency; Frequency response: 31.5Hz ~ 8.5KHz. Records Max / Min values all the time. 5. Portable ergonomic design: this sound level meter is a good grip, robust and well finished, can easily slip into a bag and transportable. Power supply: AAA battery 3 * 1.5V p Operating temperature and humidity: 0 ~ 40 , 10 ~ 80% RH Storage temperature and humidity: -10 ~ 60c, 0 ~ 90% RH Weight: 84.08 g (without battery) Dimensions: 50 * 33 * 159.5mm Quantity: 1 piece (without battery) Note: it does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!