Features: The decibel meter uses a precise condenser microphone to capture sound. It is equipped with A weightings and C weightings facilities that measure noise level from 30 to 130dB with an accuracy of ±1.5dB. 2.1inch energy-saving difital screen, backlights display, clear backlights and backlights. IP54 material is sturdy, resistant to water, dust, and falling, and is reassuring and resistant to use. Durable buttons, comfortable to touch, easy to operate and use for a longer time, not easy to fall off. Perfect for monitoring noise level in communities, home theaters, audios system, automobiles, workshops, schools, offices, factory. Specifications: Material:ABS Size:Approx.215mm/8.46''x63.5mm/2.5''x27mm/1.06'' Power Supply:3pcs AAA Battery(not included) Package Includes: 1x Decibel Meter note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.