<p>Features: AUTO Alarm Icons: the noise alarm face automatically switch when the decibel at different level. [Green ]Less than 60dB;[Yellow ]60~75dB;[Orange ]75~85dB;[Red ]More than 85dB</p> <p>High Accuracy:Decibel Level Measuring Range: 30~130dB , Accuracy: \u00B11.5dB; Frequency response range: 50Hz ~8.5KHz; Temperature Range: 14~140\u00B0F; Humidity Range: 20~85%</p> <p>EXTRA LARGE LCD DISPLAY \u0026 WALL MOUNT: Our digital sound level meter is equipped with a high-definition backlit LCD screen, so that you can effortlessly read it throughout the day at your convenience. Unlike handheld sound level meters, our premium wall-mountable dB meter is simple to set up and perfect for continuous monitoring.</p> <p>VERSATILE \u0026 LONG-LASTING: Our classroom noise meter can be used all over your space. It's wall mountable with a 10ft power cord, flat-bottomed for placing on tables, and lasts for hours unplugged with a 2000MaH battery. Also, it can be a home theater SPL meter by the TV or in your garage workshop.</p> <p>BONUS FEATURES: We've included bonus HUMIDITY and TEMPERATURE readings in addition to bringing you the best decibel meter we could. And to top it off, the sound level tester has 3 ADJUSTABLE SPEEDS (1. Fast 2. Medium 3. Slow) to make reading it a breeze.</p> <p>Color: As Shown</p> <p>Material: ABS</p> <p>Package Contents:</p> <p>1X Decibel Meter</p> <p>1X Mounting accessories</p> <p>1X USB charging cable</p> <p>1X English Manual</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>