Brand new, open box, plugged it in and works! MODERN, SLEEK DESIGN: No need to detract from your interior decor with our modern, premium design. 30-130dB RANGE: A large range of sound can be detected by the AK5000, perfect for a variety of different settings ? as a classroom volume meter, for band practice, or at work! LONG CORD 2000MAH BATTERY: With the 10ft cord, you can set up your decibel reader anywhere you need, while it can also be used unplugged for hours. PREMIUM LCD DISPLAY: Clearly read our high-def, EXTRA-LARGE LCD screen from anywhere! WALL MOUNTABLE: Rather than taking handheld readings all day, this reader can sit rightfully in its place to monitor throughout the day. EXTRA FEATURES: The monitor comes with an adjustable dBA speed setting, sound safety parameters metrics, and additional readings for temperature and humidity! ?and the reliability of an already proven product backed by AirKnight, an American company.