100% brand new and high quality Dimensions: 50*33*159.5mm Microphone: 1/2 inch electret condenser microphone Power: 3*1.5V AAA battery (not included) Resolution: 0.1dB Measuring range: 30dBA~130dBA Accuracy: ±1.5 dB Model number: GM1352 Product name: Digital noise meter Frequency weighting: A Frequency range: 31.5Hz~8.5KHz PRECISE MEASUREMENT: This decibel meter measures the range of 30-130 dBA, 35-130 dBc, +/-1.5 dB Accuracy with 0.1 dB resolution. Frequency range from 30hz to 8Khz. Real-time monitoring can provide you with accurate data on the sound level in the area. APPLICABLE TO MULTIPLE FIELDS: The digital sound level meter is useful for noise engineering measurement, quality control, health prevention and various environmental noise, including noise measurement in places as diverse as factories, offices, transportation routes, families, stereo equipment and other places. EXCELLENT PERFORMANCE: Sound level monitor provides instant readings and data hold function. The screen is backlit which is practical for darker environments. It automatically shuts itself off without any operation or manual shutdown by pressing the power button for two seconds. So you don't have to worry about battery drain. EASY TO USE: This db meter has the ability to display minimum and maximum values. Press the Min/Max button to hold a reading until it gets quieter, and then it will show the new reading. Press the button again, and it will work the same way, but will record the highest reading. DURABLE AND PORTABLE: Advanced circuit board technology and ABS housing to provide stability and durability. Size: 15.9*5*3.3cm/6.3*2.0*1.3inch, only 84g/2.96oz, lightweight and compact design, easy to carry in your pocket or purse. The sound meter is made of a very hard plastic and has rubber grips at the bottom of the meter on the left and right sides and they are both grooved so you can get a good grip on the meter while using it. Package includes: 1-pack digital sound level meter (battery not included) Note: 1. Please allow slight error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.