[Measurement Accuracy] - This decibel meter offers exact measured values with 1.5dB accuracy and 0.1dB resolution. It allows you to measure sound values at frequencies ranging from 32 Hz (eg a subwoofer) to 8 kHz (eg a bird singing). [Easy to use] - no complicated operations! Just turn it on and get a reading in less than a second. Ultra-light weight of only 0.3 lbs and curved hand design make it easy to use with one hand. [Data Hold and Max or Min Function] - Easily switch between modes with one touch. Use the "Max" function to see the maximum noise level in the current measurement range. You can save your measurement data with the Hold button. [Clear and friendly user interface] - The large backlit LCD screen provides clear readings and allows you to capture sound data at night, making this ideal sound level meter for use in factories, workshops, schools, homes and more. [Intelligent Energy Saving] - If the sound level meter is not used for 10 minutes, it will will automatically shut down to save power. 1 x 9V battery required. (Battery not included) For outdoor use.