【Wide Measuring Range】 Measuring Range: 30dBc ~ 130dBc, easy to apply in all occasions and at all sound levels. AP-882C Noise Meter supports auto backlight, auto / manual power off and Max / Min data retention. 【Portable Mini Sound Level Meter】 Weight: 80 g ； Size: 120 * 57 * 20.5mm ； The AP-882C sound level meter is designed with an assembly line body that allows you to hold and grab it easily or attach it to the tripod. 【 Selection of FAST / SLOW】 FAST Time Weighting: Using a time constant of 125 ms, which is applied in most cases and mainly used for testing steady state signals. SLOW: Using a time constant of 1 second, when the value indicated by the sound level meter varies considerably, slow weighting is used to ensure an accurate reading. 【Sensitive Sound Probe Windproof Ball】 1/2 "electret condenser microphone for high accuracy and long term stability. Comes with black windproof ball, when the wind speed exceeds 10m / s, please mount the windproof ball on the microphone head to avoid your measured data affected by wind noise and make a measurement Accurate. 【Battery Included】 A 9V * 1 battery is included in the package. Basic parameters: Accuracy: ± 1.5 dB Resolution: 0.1 dB Display: 5-digit LCD Linearity range: 50dB Frequency weighting: C Measuring range: 30dBc ~ 130dBc Sampling frequency: 2 times / sec Frequency range: 31.5 HZ ~ 8.5 HZ Quantity: 1 piece Note: this does not include other things, the color is based on the first picture, and 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!